This is laughable. C'mon, man. You CANNOT be serious. Ten to 15 percent?!
Saying what you do is as bad as those twits who claim drugs are a "finishing touch" in bodybuilding.
Short term, yes, I stand by what I wrote. If you look at a few of late 70's meets where they really tested the guys, and they had to clean out months in advance, 3 lift totals dropped by close to 30%. I ran the numbers a few years ago for reported top drug free lifters and the non-tested lifters(same weight class) were still close to about 30% stronger than the supposedly clean lifters. Now it gets harder to tell how much strength is gained on individual lifts through steriod use, for instance in those few 70's meets I mentioned, bench usually dropped by a decent amount, squats too, but deadlifts were still closer to drugged numbers.
I'm going to stand by my close to 30% higher 3 lift total figure, but allow some lee way on the individual lift figures because that would take a lot more work to figure than I'm willing to give it.