Actually a couple of the Pro's I've met, watched some other Pro's and top dog BB'ers train and have heard about second hand are not always the best code source for knowledge and training advice. Because most all of them didn't have to make any major adjustments or follow any special diet plan when they first started lifting...they added muscle faster and got stronger with the basic stuff. Compounding this with increased use of, let's say, muscle building boosters, their natural potentional was greatly increased. When they did reach monster size they would approach a experienced bb'ing trainer (or trainer approach them) to set up programs for refining their bodies and prescribing a better mix of those muscle boosters. Once they get that Pro card, their training & diet programs are mapped out by the trainer or other people who may have a interest in the BB'er. As well as the timing of muscle boosting joy juice cycles. From their point of first picking up a weight, at a young age, to their getting a Pro card, the easy gaining future Pro BB'er did not usually obtain the knowledge or experience of average BB'ers who must/had to study, struggle and try every workout under the sun for years to gain any respectable muscle mass. I would suggest that a lot of the Pro's are limited in workout knowlege with anything beyond lifting a weight up and down. If most people think a Pro's hold the secret to the BB'ing world, these people would be wrong.
But offering another point of view here, BB'ing is pretty simple in reality. It's just BB'ing, not rocket science.
I would hold more value in the knowlwdge and logic on progressive training offered from succesful and experienced veteran BB'ers than just about anyone else. These veteran BB'ers don't consider themselves experts by any means. Just hardcore in their work and attitude towards BB'ing. And with volumes of hands on training experience. Good Luck.