I would expect a coach to deny cheating, regardless of how small the infraction.
I think a better question would be to ask Ferentz whether his staff was approached by the refs about the offense. Either the refs discussed the problem with Ferentz or they didn’t.
The video provided above clearly shows the clapping on one play. the only question is whether it was done specifically to throw off the timing.
Those who think this couldn’t possibly impact the location of the snap are not thinking things through. If you are the center and you know you’re QB is still in his pre-snap read but all of the sudden you hear the snap signal, that could definitely take you by surprise and cause you to rush the snap thinking you are already late. We would have to hear Jurgen’s explanation to know what the problem was.