Oh, and the even more galling part... when watching Hulu on regular Comcast (without the VPN), the shows average around 500-900kbps. When it flips over to displaying the commercials, it jumps to 8Mbps or more!
This is actually not malicious at all. An individual ad gets served to many more people than any given show, and as a result they'll get cached closer to the destination. Still pretty obnoxious though :)