I don't think that is controversial at all. A stock or stock replacement clutch should handle a stock engine, period. If it is a modified engine then it may not be able to hold it.
To clarify something that's probably obvious, you say that it slips when you push it. My first thought was that it slips when you push the pedal, which it absolutely will and should at some point. Then Phil's comment kicked my brain into gear and by push it, you probably mean under hard acceleration?
Many of the higher powered street guys use Centerforce dual friction. I have one of those in my truck (not so high powered, yet) and really can't see a reason to go with anything else, perhaps aside from cost. The pedal feels like the stock replacement clutch I replaced and it's supposed to hold about 500hp, which it does seem to do, going by the number of them in use at the Y-Block Nationals through the years.
In contrast, I have a Mcleod in my Firebird which is their step up from stock replacement and that pedal feels significantly heavier while only being recommended for about 300hp. "Mild bolt on mods" is what they say. It's not too bad but I do notice it when I switch to the car after driving the truck for a while.