WOW...
I find that hard to believe that she would say that to your class about protein intake. Are you sure she wasn't talking about the regular population of basically, sedentary people??? If it helps for now my University Professor with the same degrees has differing views!!! Not to mention the college i attended before comming to this university had a Ph.D that disagrees with my current professor. The best thing you can do is research info. on your own and base your own conclusions on what you have read, seen, experienced!!!! Just because professors are professors does not mean they are always correct or credible. Don't get me wrong they are experts in their fields but just like Dr. Atkens and all those others who come up with these crazy dieting techniques are all using their knowledge learned, experimentation, and what they feel will help!!! Opinion and sometimes ignorance of info. can sometimes lead professors to make these types of blanket statements. I.M.O "It is better to tell somebody you don't have the answer than to take an educated guess and think you know"