Hmmmm, can you prove that, or am I required to disprove it? Also, define "most." Also, I have yet to see a consensus as to when a boat is planing. Or stating it another way, I have yet to see a consensus on what defines a planing boat. However, if you look at the immersed lines of the leeward hull of the attached F16, you see some straight, flat runs. So you have speed well in excess of hull speed, some percentage (most? significant?) of boat weight and sail force counteracted by dynamic lift, flow separating cleanly from the transom and a portion of the hull of proper (if compromised) planing geometry. If not planing, then in that power-sucking semi-planing regime. But not displacement.