I also picked up a USB dock and currently have the hybrid drive connected using it:
I copied OpenOffice over to the new drive.
a - 15 seconds for first launch (to the screen were you select new documents or open existing)
b - 4 seconds average for first launch after system shutdown
c - 1.5 seconds average for subsequent launches.
I suspect the difference between B & C is due to system libraries that have been loaded. My internal drive (also 500 GB @ 7200 rpm) takes about 7 seconds for the initial load after system shutdown, but also 1.5 seconds for subsequent launches.
Wonder how much the USB 2.0 connection is slowing down the new drive.