I think they were referring to supplements in general there and I personally think he is right.
Just look at the sponsorship that sports drinks put into athletes and sporting events.
Secondly if you look at sports/fitness magazines and gyms they are all advertising and selling supplements.
I've seen loads of people down the gym who are using all kinds of the supplements they sell (and Im not talking just whey) and yet they aren't really doing body building or serious athletes. Its because they've been convinced by the gym and marketing that they should be. There are certainly a lot of young guys at the gym I use who seem to love showing off that they are taking supplements.
This, I've done a fair amount of weight lifting (strength based) and I don't touch any of that ****. It seems that people tend to look at it as magic power when in reality it's intended to be a supplement to your diet, and that's it.
A friend of mine once tried to convince me (and he wasn't winding me up) that he got rid of a cold in a day by drinking protein shakes.
The commercial aspect is most definitely why they're pushed so hard as being "necessary". They are extremely high profit. They're a great convenience for people who can't sit down to a protein rich meal due to work commitments and all that, but they are in no way a replacement to a good diet, which is how people seem to be using them.

