Something else to think about is the particular device you are accessing, if it is a 1.1 device the USB controler will step down for compatability.
I wonder if that slows other 2.0 devices that are also connected?
__________________
MoonShadow
Dell 2405FPW, BenQ 17", D-Link DI524UP, Epson CX5100, Epson R310 + CIS Kit
Vista Ultimate, P4 3.2ht, ASUS P4C800-E Dlx, 3Gb RAM, XFX 6600GT 128Mb AGP8x, 700Gb HDDs, DVD-RW, DVD-ROM, SoundBlaster X-Fi