My coach always says the exact opposite. That you can take your time on a flip and really "savour" that BI edge before picking in (I assume he's referring to a 3-turn entry, because Mohawk entries on Flips are usually quicker), but you need to be really quick on a Lutz, because picking in at the right moment is crucial on a Lutz to prevent Flutzing and achieve actual (visible) counter-rotation.
(and personally I can confirm what he says, albeit not for triples or quads

)
And actually, out of all the jumps, the Loop is the one I would describe as the most "stalled" (when done from a Mohawk). So by your logic, that makes it the easiest jump, right?
As for requiring good timing, I always felt the Salchow is generally the most notorious jump when timing is concerned, because it has a very specific rhythm to it.
Besides, I don't think what you're describing is necessarily a criterion for difficulty anyways. Especially since there's usually several take-off techniques that can be modified somewhat in terms of timing and rhythm and to the skater's liking.
(also: I believe most male skaters jump their 4Fs and 3Fs from a Mohawk, not a 3-turn)