Everyone fights for a piece of the same download pie, the autoupdate function doesn't allow for server selection as to where the download comes from.
I have been on-line many times since my selection of updates to download and the usual thing that happens is the update shield comes up to say it is downloading the updates you selected. That happened once for a few seconds and promptly disappeared, so no auto download selection download.
I'm trying to allow the autoupdate function do its work, I have mine set to check and notify me but not automatically download. I select the ones for download and install and it is supposed to trot off and download those I selected. I had the same trouble last patch Tuesday where it took three days to eventually get the updates.
A visit to window update says you need to download the latest upgrade, to supposedly improve updates, no mention of WGA if you OK this, the first thing it tries to do is install KB892130 the WGA patch which I have been avoiding.