Finally Vista can move & copy files as quickly as XP

netsh interface tcp set global autotuninglevel=disabled (reboot required)

If you're seeing terrible file copy speeds in Vista, those are the magic words that fixed mine. After 18 months of agonizing over the slow file copy operations on my work Vista computer, I can finally stop using the Windows2000 terminal server for one more thing that Vista was lacking in. Yay!