I think you either had a serious system mismatch or some weird room issue, since the P3ESR is anything but slow. When driven and setup properly, they are extremely nimble and excel in micro-dynamics. Where they fall down a bit is in scale and bass extension, but you'd expect that from a small inefficient speaker. I'd not quite rate them as fast as an electrostatic speaker - very little is - but for most purposes they are more than capable in keeping up with any musical genre. In fact, they're especially good at speed and pacing IMHO.
They are too warm to be good in micro dynamics or nimble.
Perhaps I have a system mismatch, but I highly doubt it.
Well, we agree to disagree then.