I already googled this when I first got vista it seemed slow lots of people reporting the same thing. One of the things that slows vistas copy down I believe is that it tries to implement DRM copy protection.
But that’s not what really annonys me the thing that annoys me is the time estimate is always way off sometimes I get reports of hours on large copies when I know it will take around 20 minutes or something. This report becomes little more accurate until the process is complete. I find this rediculous I can do an estimate just doing the amount transferred so far and time taken compared to the total file size. I know fragmented and small files take longer to copy but seriously can’t we just have a simple estimate which I find much more accurate for the general case.