Er-- well, good, bad, and weird is about how DD spent her free time whether it was front or back end (as aeh noted-- during work time or as a reward for not dawdling during).

So I don't necessarily see it as a bad thing so much as inevitable, and at least in a high quality Montessori setting, probably one that is better on average than neutral.

Schrödinger's cat walks into a bar. And doesn't.