ah old coach Poliquin... remember him from muscle media 2000 ( as it was then ), awesome training advice and often such simple overlooked things. People often assume because the pull up is a hard exercise that it validates pure body weight training but as stated here it depends on the exercise as a regular press up is easier than a bodyweight bench press. I agree that a combination of the two is best and don't forget that once people can do many reps with bodyweight exercises they add additional weight to the movement in the form of a dumbbell or plate etc to increase its difficulty level further. Functionality is also king and I think the true golden era of body building was the 60's and especially early 70's when the sport was filled with guys who had trained in american football or track and field so could do the complicated olympic lifts and control their bodies. Look at the old photos from muscle beach and they're full of people doing balancing acts etc.... can't imagine Jay Cutler managing that!!! in pumping iron Robby Robinson is shown sprinting on a track and could do 100m in less than 11 secs!! They were big guys but not so big they'd lost all functional movement in their bodies. Gone a bit off track here I think!! ha but you get the point I hope!