Our VPN users experience very slow file transfers (50MB can take 20 minutes with a 20Mbps FiOS connection on each side). If the file is transferred over HTTP or FTP, it's just as fast as you expect. I suspect this has something to do with how Windows handles file transfers, as it probably doesn't expect any latency. Is there some way to tweak this?
The VPN is SafeNet IPSec and the clients are XP.