From what I can tell, there is not much *most* people would experience that would even allow them to notice the difference between the clockspeeds you noted in current processors - unless you stare at a utility that measures clockspeed... and that is neither fun nor productive. You have nothing about which to "be dismayed", unless your thing is staring at clockspeed utilities.
I did a litte Core 2 Duo research on wikipedia. it says that the desktop processors are clocked at 1.83, 2.13 Ghz etc etc. Whereas the mobile processors are clocked at 2.0 , 2.16 Ghz etc etc.
Now Apple's iMacs have Core 2 Duo processors and they run at either 2.0 or 2.16 or 2.33 Ghz. Is it true that iMac, a desktop computer, actually has mobile processors in it? I am kind of dismayed.
How much of performance difference is there between the mobile and desktop versions?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic