Again my experience with Q5 revealed exemplary bass response. It does require a hefty well designed amplifier.
I think it has to be said that if you are accustomed to hugely humped-up bass, and then you hear more linear bass, it may leave the impression that something is missing. However, what it really means is that something was added, but that the "added" something is preferable to you. The latter is not high-fidelity.
I can say this after doing many, many in-room measurements and calibrating my expectations to more linear response (which I had in spades with the Rockports).