I find that the Mini's reported connection speed on my WiFi network will vary between the max 54 mbs, down to 48, 36 and sometimes lower. This is all within very close proximity to the router and full signal strength. I've just changed to a different router and it's still the same so it isn't that. Also my Asus 701 which is also running XP does not have this issue on the same network, it always reports a full 54 mbs.
I really can't say there is any noticeable change in performance when the lower speeds are indicated, so I don't know if the speed is actually lower or it's just being reported as such.
Wondering if anyone else has observed the same thing?