p2p shaping?

Well, I’ve been sitting on the 10 day demo of the Burning Crusade for a month or two, and have just started downloading the client. 3.5GB, which, maxed out will take a couple of days to download. I have to use the Blizzard Downloader program to get it, and I just discovered that turning off Peer-to-peer Downloading dramatically increases my throughput. I went from 6K/sec to 25K/sec. I wonder if this is to do with p2p shaping thatGoTalk, the people who bought out WildIT, apparently do.