A student of mine has the Jeff Beck model, and as far as I can see, it will depend mostly on the bridge's setup. Beck uses it a little bit raised so he can go up with it, but it can be set up as well so there is no up movement at all (just as any normal strat bridge). The original bridge setup was uncomfortable for my student, since he tends to rest his hand on the bridge and this was causing constant pitch problems, so he got it set up flat against the body.