Nice review DonutHunter.
I must say, I own my own box also; where I run a couple UT server's myself. Though I hadn't noticed THAT big of a jump in CPU usage, I did notice a couple presentages when I first put it on. Lag hasn't been a problem for me either. However, I have had a few people not be able to connect due to it not knowing where to install. This was fixed once they installed it manually.
Either way, this is a good step in the right direction I think.