In the bus, more than in other models, lo houred pilots tend to rotate very rapidly, chasing the pitch FD bar. I did it myself a couple of times. Its easy with the sidestick, lack of experience and confusion about how FD works. This was detected by foqa in my airline and corrected since then by explaining the guys that the FD bar doesn't give pitch rate command.
If there is no engine failure, rotating slowly, even less than 3 per sec, is ok and it is smooth and nice. If then you have tahe failure your ass is covered.
If there is engine failure it is probably better to rotate slowly than rapidly, since flight path will lag more behind pitch.
So in conclusion I always favour a slow rotation (but without delay, at VR)