I'm lucky and have it easy... my preferred cadence for the Brommie is about the same as my preferred g.i.. I can push it for a couple of blocks above 120 rpm to race the traffic lights but I really end up sucking wind. My track bike and single speeds are strictly for recreational/training purposes with no compromises so they can be geared a little higher.
BTW, you posted that Moulton porn pic just to rub it in, didn't you?