I see your post now VK, I agree on this, but as said (and to my surprise) was the extra-wide channels and not the height the ones that made most difference.
Forgot to mention I tried this too in a friend's system with (very) high ceiling, same result. I was expecting otherwise (in my room, wide but not very high, it seemed 'normal' the preference for extra wide over height).

Basement: Linn Sneaky DS, 568.2mm, ARS Sonum Gran Filarmonia, Ramallo Allegro.
Living Room: 602, Linn Akurate DSM, Hypex Nc400, B&W 802D.