[dalbasal]

I haven't, but.. commenting on the comments only

If it was possible to objectively determine teacher quality, student evaluation probably would not exist in the first place. The reason we ask people's opinion is in order to quantify the subjective. Double edged sword, because we tend to conflate quantified & objective.

That's half the theme here. erm.. people's opinions are subjective..

Part of the problem with "student-as-consumer" is that students aren't always the real consumer.