Just not skipping a workout for 14 weeks, and eating two meals a day instead of one, my bench will go up to around 350 - at this age, likely more. And that would be at 180 body weight...maybe a cunt hair higher.
That said, just because some of us respond on barely anything doesn't mean we would respond highly on a high amount of stuff. Could be that we respond on a large amount of things [or even just more food], but would stop at a lower level, and not respond to much more, if we had a lot after that.
Apparently I can bench press 350 at 180, while eating 94 grams of protein a day - that doesn't mean I could double my protein intake and expect much greater gains. My point is, I think people have a sort of linear model in terms of predicting gains they would make on gear. For all I know, I could be a non-responder to AAS. Other people are lucky, and respond accordingly to anything and everything.