Actually guys, the F1 car is so superbly set up that short of harsh low frequency type bumps, IE. curbs, they are pretty smooth.
Motors have to be balanced to superbly tight tolerances to be able to run 18 even 20 thousand revs.
The driver feels no wind buffeting because that equals drag and drag is a major drag when it comes to CFD and wind tunnel development of these cars.
If any driver had to endure severe and constant vibration, they would never win over the course of a race at those speeds.
G force plays a much bigger role in driver fatigue than vibration.
The driver has to deal with steering issues depending on balance and over or understeer issues but, vibration? not hardly.
No wind? I suggest you watch and listen to this video carefully. In fact, any time the driver (di Grassi) turns his head just slightly, the wind noise picks up and changes because the shape of the helmet/visor is presenting itself differently to the wind.http://youtu.be/jBbPGQ3Bpug
Agreed, all reciprocating components are balanced to the nth degree, but that serves to only minimize the vibration, not eliminate it. Even with the current 90 degree V-8, you cannot completely cancel out the primary balance and secondary balance vibrations. Think about it, the piston travels up and down, that movement can be cancelled out by counterweights on the crankshaft, but that rod end on the crankshaft is also going side to side too. That isn't cancelled out.