Thats efectively the size of it. We have tens of millions of useless datacentre nodes that are at least a version behind and are slowing everything down,
see ANT Token - Price & Trading topic - #930 by chriso onwards
Uploads are a total pain right now - possibly getting slightly better. There are tools in work right now that need some sharp edges filed off that will make uploading a LOT simpler for most folks but until we can get 12-15 million nodes to upgrade that have no real incentive to do so - cos NOT upgrading maintains their earning potential - then we are somewhat screwed.