When I read about someone doing 25-30 sets of anything per training session with good results over more than a few weeks, I always wonder if he's wearing a T-shirt with "Thank God for Chemistry" printed on it. If not, he should.
Nobody can do that many sets and gain from it without using some kind of drugs.
Personally, I don't care what people eat. If some people choose to fill their venes with fat, reduce their testicles to shrunken raisins and grow breast size D so be it. But I do believe that you should be open about it and not give anyone the illusion, that the way you are training is something anybody can do.
There's a way to train with drugs and there's a way to train without drugs. Don't get those two mixed up.