Not so sure at that speed. 500Mb partition with every patch on earth should load in around 200 seconds at that rate. 300Mb in 120 Seconds.
This is only right if your partition is full and you're reading everything in that partition which, to load WB is probably not the case?
My boot partition is a few hundred Mb running off the A1200 on-board IDE, but it loads WB with the ClassicWB pack in about 10 seconds.
