The speed of the tests is killer! MaidSafe does not slow down in the curves and it accelerates even more - for the first time (I do not know how) I messed up the tests and instead of posting them here I posted them on IntolerantNodeNet 
Below is the data from uploading the 94.2 MB file to the network:
Here is the result of uploading the same 94.2 MB file using safe files upload -c 10 --batch-size 40:
PS C:\Users\gggg> safe files upload -c 10 --batch-size 40 E:\gggg\Pictures\VID_20210505_113014.mp4
Built with git version: 2c47455 / main / 2c47455
Instantiating a SAFE client...
🔗 Connected to the Network
Total number of chunks to be stored: 190
Transfers applied locally
All transfers completed in 21.5237144s
Total payment: NanoTokens(1105007) nano tokens for 40 chunks
Made payment of 0.001105007 for 40 chunks
Stored wallet with cached payment proofs. New balance: 299.998791071
Uploaded chunk #41ad71.. in 3 seconds
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Uploaded 40 chunks in 102.5828224s. Current progress is 40/190.
Cannot get store cost for NetworkAddress::ChunkAddress(a3e428(10100011).. - - a3e4281718ad85e08e6c45fcc72c6f8f38d090265a06bc5507c930870f4f40d4) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Cannot get store cost for NetworkAddress::ChunkAddress(ca480d(11001010).. - - ca480d3c934ea77d13a4776da507ae09fbab6a88e8b8990b6be0705f90df5d0e) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Cannot get store cost for NetworkAddress::ChunkAddress(f49535(11110100).. - - f49535bc1900e718abbd970659d4dbe6e371cdc5f1948b42938e0c64f460818e) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Transfers applied locally
All transfers completed in 20.5847587s
Total payment: NanoTokens(552316) nano tokens for 37 chunks
Made payment of 0.000552316 for 40 chunks
Stored wallet with cached payment proofs. New balance: 299.998238755
Uploaded chunk #76a7fd.. in 3 seconds
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Uploaded 40 chunks in 131.730995s. Current progress is 80/190.
Transfers applied locally
All transfers completed in 19.9657908s
Total payment: NanoTokens(1197955) nano tokens for 40 chunks
Made payment of 0.001197955 for 40 chunks
Stored wallet with cached payment proofs. New balance: 299.997040800
Uploaded chunk #f1ee73.. in 3 seconds
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Uploaded 40 chunks in 123.7981329s. Current progress is 120/190.
Cannot get store cost for NetworkAddress::ChunkAddress(dd00f7(11011101).. - - dd00f709bac1cddb75876aae6559e4d57b06baab032334290fe916feaa480934) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Cannot get store cost for NetworkAddress::ChunkAddress(bb919c(10111011).. - - bb919c1f4472996814861b5d96046c5e9be559c89996367fda1754c422a899b6) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Cannot get store cost for NetworkAddress::ChunkAddress(dd81e7(11011101).. - - dd81e7576610eed5244961e8446627aa97c92f9b41c330d1a34874458574e91c) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Cannot get store cost for NetworkAddress::ChunkAddress(062f32(00000110).. - - 062f32ee798dc58ab4aa06d27f86b6965e571f50fcdbea58271f9d6303aff4f0) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Transfers applied locally
All transfers completed in 23.8443828s
Total payment: NanoTokens(1244769) nano tokens for 36 chunks
Made payment of 0.001244769 for 40 chunks
Stored wallet with cached payment proofs. New balance: 299.995796031
Uploaded chunk #6b93cf.. in 3 seconds
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Uploaded 40 chunks in 137.643782s. Current progress is 160/190.
Cannot get store cost for NetworkAddress::ChunkAddress(09379f(00001001).. - - 09379fad4ac1aee45fd74edbff26ac8f16c2b08e8748061b50dac9bd62b40a7b) with error CouldNotSendMoney("Network Error Not enough store cost prices returned from the network to ensure a valid fee is paid.")
Transfers applied locally
All transfers completed in 28.005338s
Total payment: NanoTokens(573601) nano tokens for 29 chunks
Made payment of 0.000573601 for 30 chunks
Stored wallet with cached payment proofs. New balance: 299.995222430
Uploaded chunk #e28cc1.. in 3 seconds
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Uploaded chunk #9c1eb9.. in 2 seconds
Uploaded 30 chunks in 127.1653976s. Current progress is 190/190.
First round of upload complete. Verifying and repaying if required...
======= Verification: 190 chunks to be checked and repaid if required =============
After 169.7906244s, verified 190 chunks
======= Verification complete: all chunks paid and stored =============
Uploaded all chunks in 13 minutes 22 seconds
Uploaded VID_20210505_113014.mp4 to 9c1eb9226ab2bb720a3f79eeaa9adc76476eedc81cf82a7410296b9b7d0c113c
The standard upload resulted in all chunks being uploaded in 36 minutes 27 seconds, while the non-standard upload concurrency and batch-size -c 10 --batch-size 40, uploaded all chunks in 13 minutes 22 seconds.