<p>A lot of the Harvard labs have about 20 people, 40 may have been exaggerating, though I’ve heard of groups like that when the professor’s were research appointments in biochemistry.</p>
<p>Of course there are great and not so great lecturers. What I’m saying is my experience is that at some schools (and I can’t name a common characteristic amongst them except that they hold this as a value) value teaching service more than others and as a result, in my experience, undergraduates have increased opportunities for exposure to great teaching faculty.</p>