It seems to me that both, Magic Mouse and Magic Trackpad respond differently on Windows. While using them with Mac OS X feels natural, on Windows 7 with drivers extracted from Bootcamp Upgrade, it feels spongy / laggy / delayed / with latency, no matter what the mouse settings are. So I feel like I'm not in touch with the mouse pointer (cursor).
It makes me sad that I should not be able to use this excellent hardware on my Windows PC, and I would like to know if this can be fixed.