thats only because i havnt finished my exercise science degree yet
as for the bent rows v's lat pull down i have seen a bunch of studies on muscle recruitment for a number of different exercises. but yes i get your point.
and your right nutrition is the biggest joke...thats the only reason i went exercise science with some nutrition instead of nutrition with some exercise. by the end of it all i would know is bs. We were constructing diets for people using the "healthy eating pyramid." first you calculate carb needs which is like 70% then protein needs which apparently is 0.8g/kg for everyone (any more than this apparently will only be stored as fat or coverted to glucose) and the rest was fat. anyways...