I just found some install times:
http://www.gamespot.com/hardware/blogs/hardware-insider/909185655/26656232/xbox-360-hard-drive-game-installation-testing.html
NBA Live 09: 6.3 GB in 9m7s (or 11.8 MB/s)
The Force Unleashed: 6.6 GB in 9m47s (or 11.51 MB/s)
My Mario Kart Wii friend code: 2707-1866-0957