Fast Ethernet but actual speed is 10MB only

Hi,

I just bought a Linksys 5-port workgroup switch to network my 3 laptops running Vista, Vista, and XP using CAT5e UTP. The LED in the switch indicates 100MB and Full Duplex but when I am copying files from one computer to another, the copy speed shows 10MB only. Is this normal? Or is there anything I need to do to utilize the 100MB?

Thanks in advance for your help.