I dunno; I think all this talk of 'planing' is really kewl; gives new justification for the typical silly bike reviewer talk of 'steeds' that just seem to 'leap forward' once one touches the peddles pedals.

FWIW, given the latest twist on this 'theory' just upthread, I propose a new name for 'planing'; I propose 'inchworming' as a much more accurate simile. Think about it: the frame flexes, and that 'stored energy' is then somehow, by some mysterious process, fed back not to the chainset -- you know, that thing with peddles pedals that actually is turned by the cyclist's legs and drives the bike forward by transmitting that energy to the rear wheel via the chain drive -- but directly to the rear of the frame. Happy to provide a visual demonstration of this process (caveat -- I may, of course, being a non-technical person, have misunderstood this magical mechanism):