|Not really. About the only thing you can do is check the NIC's on both PC's and ensure the speed is set to "auto" and then check to see what they're connecting at.|
If they're connecting at 1 GB, then everything is fine. As far as network utilization goes, at 1 GB, 1% is a whole lot more than 1% of 100 or 10 Mbps.
How long is it taking to transfer the 2 GB's of data?