Hm. Just tried downloading one of the non-alternate ones and am getting >2mb/second. Are you unable to get to those? Seems like a few people always have trouble with S3 (which is where they're hosted), which is why the alternate links are there (those are hosted on the same server as the forum, so wouldn't really do as the primary source.) For those I'm also getting around 2mb/second... not sure why it's so slow for you. How slow is it?
As far as a torrent, I'm not really up on that - apologies! And, honestly, there are already enough places to update every time there's a new release/hotfix/etc, and it seems like it'd be more difficult to manage that way, too.