Clutch Pedal has grainy feeling?!!

[CJS]

My 2nd Solara, 2001 V6 5-spd, 38,000 mile mint lease trade-in, just got it from a dealer for $13,500. Looks and drives as new except the clutch pedal feels grainy or has a vibration like feeling in it between 1/2 way down and the bottom of its travel.
Funny thing, it only does it when everything is warmed up, it is smooth when cold, only does it above 2000rpm, goes away above 4500 rpm. Clutch itself is working perfect, glass smooth engagement, no vibration in the engine, tranny clutch pressure plate or flywheel etc. Just this weird annoying grittyness in the pedal. It is somewhat intermittant also, doesn't do it every time, gets worse the longer the car is driven and the hotter it gets.
Anyone got any ideas? Maybe just needs to be bled, bad master or slave cyl?, bad throw-out bearing?

Ps. I also have a 1999 Solara V6 5-spd I bought new in 1999, drove it 155,000 miles, still have it, it still drives great, it does not do this at all!

The pedal effort on the 1999 pedal is so light it is like there is no clutch. The effort on the 2001 is twice as heavy as the 1999?

[PASolara]

If its harder and feels thats way i would guess its the trow out bearing.