Ok I just threw together a little video showing 0-60mph before the supercharger, showing underneath the hood the morning I finished installing the supercharger, and a video showing 0-60mph with the supercharger. The first run took approx. 14secs, the second run took approx. 8 secs, and this was with the factory set 6psi boost.
http://www.atvparkvideo.com/videos/hummer.wmv
Sorry the file size is so big on the video, I'll compress it to a lower resolution tomorrow for those of you without broadband.
Grizzy