Cadence & the Blitz

So I'd like to know what folks think about Michigan's cadence and snap count. Am I wrong to think that we do not vary or change them up much at all? Some teams use them strategically (e.g. to expose blitzers or coverages, or draw the D offsides and slow rushers down).

Obviously, there are advantages to keeping snaps consistent -- for example fewer false starts, motion-timing, and more time to shift formations. However, in the Wisconsin and Colorado games, you could see that the defenses were timing their blitzes well.

I started wondering if the features of Harbaugh's playcalling make it more difficult to fuss with snap counts. For example, the strategy of calling multiple plays in the huddle (with WC verbiage), plus using lots of motions and shifts. These tactics can eat up playclock time, and add layers of complex information for players to remember and execute.

Observations?

Edit: I am not in any way criticizing Harbaugh or suggesting he is unaware. I am simply asking what we think the reasons are (assuming we do think Michigan keeps consistent cadence and snap counts).