Sorry but that is just un-true. When you have a hard drive running at 5400 rpm like apple, thats the fastest you can move data off of it. Loading times include getting the drive up to speed and physically moving the reading needle to specific points on the disk. When you have SSD you don't have to worry about any of this. The information is instantly there, making the clocking speeds on the CPU actually usable. I guarantee if you go to your local apple store right now and ask for any 2 MBPs that are the exact same except for SSD drive and run any comparison, the SSD model will run AT LEAST 2x faster.
See these screen shots. I'm running an HB conversion as we speak. I hope you are right because it would save me a ton of dough but everything I've read and heard says it's the CPU bottlenecking.
View attachment 272066
View attachment 272067