BitTorrent Patch Client (Score 1)

I am curious what the original motivation was behind deciding to modify and use a BitTorrent client as the distribution client for the patches?

I realize that bandwidth is a very obvious concern that might be one of the core reasons, but I have always found BitTorrent to be obnoxious and slow unless correctly configured for use in my router. I would even go as far as to guess that a large portion of subscribers to WoW don't know how or haven't configured their routers correctly. The impact, unfortunately, is long waits and slower download speeds while many people attempt to connect and download the patch from the percentage of us that do have our routers configured correctly. Once the number of users still trying to get the patch dwindles in gets a little more difficult to obtain it due to the nature of the BitTorrent network.

Now that the game has an unparalleled success rate at ~3.5 million active subscribers is there any possibility of going back to a patching system the uses direct downloads from your servers?

NOTE: I ask this question realize that 3.5 million subscribers is likely generating enough revenue to adequately offset the cost of the bandwidth needed to serve patches to 3.5 million clients.