Bullshit, the guitars are controllers with buttons. I forget if it was Slash or Joe Perry that said learning the game is not like playing a real guitar.
I've done bass guitar and vocals, and suck at both. But I don't own the game, so there.
I can't tell if you are really disagreeing with me or not. What I am saying is that if you play a real guitar then you will have trouble with playing the guitar with RB or GH. Guitar players, at least myself and those that I hang around, instinctively treat the controllers like they are guitars rather than controllers. And, because of that, really suck at the games.
Some of the best players I have found have been the people who play around with the guitar, but have never really learned to play it.
