Never said it did. But your buddy is claiming that if somebody lives longer than average, it's the new average. Just showing how silly that line of thought is.
The difference between the two average deaths (I'll use 100 and 120) can easily be countered by dealing more damage quickly. Obviously, if I KO at 100%, but can only deal 5% a move, while you can KO me at 120% and deal 10% a move, you're going to be winning. I can't figure out which sub-board that DPS topic went to (it was meh evidence at best, but good for a rough ballpark in some situations). I fully believe MK will rack up damage faster with his moves then Fox will, which means he'll be hitting Fox's "average KO range" sooner.
BTW: if we go into super super theorycraft bros: Fox's Utilt combos don't work. Mr.Doom SDI FTW.
@K.I.D.: Nah, but I'm considering making Fox my next "PT like project" if you would. Worked well last time, I was proved to be correct after all. Depends on how college is this upcoming semester.