So, since I tend to be a speed freak of sorts, I wanted to see just how well, or not, my storage devices perform. In my Dell Precision M90 laptop, I've got a Seagate - Momentus 100GB drive, then a Western Digital Passport 250GB USB external drive, and finally a PNY Attaché 16GB USB thumb drive.
The following are the screen shots from HD Tune that indicate how each performed:
All in all, I'm fairly pleased. My primary desire is to simply have capacity. But when you start storing GB sized database files and virtual machines, better performance can mean a lot!