[Head416]

802.11b would explain those speeds, but that can't be the cause of the wired speed. You said you tried to disable wireless - are you not sure? The NICs in the laptops are probably 100Mbps, which shouldn't be the limiting factor keeping you to 11-13Mbps. Were these results repeatable several times? Did you test when no other devices were connected? If so, I'm suspecting performance of the OS itself. Are they running lot's of software? Look in your system tray (next to the clock in the lower-right corner), are there a lot of icons there?