Well I have a laptop with the LCD drivers installed and I can't change the refresh rate at all. Before I agree or disagree with anyone, I'll wait for an educated answer. Or perhaps a quick Google search would clarify things.
"Are refresh rates applicable to LCD monitors?"
"Unlike CRT display technology in which the speed the electron beam is swept from the top to the bottom of the screen determines flicker, an active matrix display uses an active element (TFT) to control each individual pixel and thus refresh rates are not really applicable to LCD technology."
Here is also an interesting read regarding LCD's.
"LCD refresh is listed as the millisecond rating of the display. The lower the milliseconds, the FASTER the display. Early LCDs had as high as 35ms ratings, which correlates to 28.75Hz refresh! On a CRT anything below 60Hz refresh would result in an unstable image, but LCD's don't rely on scan lines and do not flicker, so early models could get away with REALLY low refresh rates."