Seems the EC does a terrible job of prefetching files it needs, and KR had the same problem. If you have a problem with connections or lag after a game patch, then it's probably fragmented files.
Move all your UOSA files to another hard drive, the defrag and optimize (close up spaces) with a decent defrag program. Then move your files back to your game folder. This puts all the game files together and really speeds things up.