I have my media mirrored on my HTPC and my main rig, and they're directly connected via 1GBit crossover. Therefore I should get maximal HDD read/write speed when transferring. I do when I copy from a mounted network drive, but pasting (either direction) is really slow.
For example, if I paste a 10GB file from 7 to a mounted drive from the XP based HTPC, it takes ~60 minutes. If I jump into logmein and use the HTPC to initiate the copy, it takes <5min (basically the max write of the mounted drive). This difference is in both directions.
I searched but only found "slow network speed" in general, no one seemed to have this issue, or at least realize it was the issue.