I don't buy that "physically stronger than Cell crap" personally. Cell was toying with Vegeta and Trunks. He never used close to his full power against either of them. He only made that comment to Trunks to taunt him about how much he sucked.
I'm sorry, but I can't agree with you on that. Yeah, Cell was toying with Trunks, but all Cell did was not dodge.
If you still don't agree with me, then how about this. Cell, was able to almost tank a Final Flash, gets beaten to wall because of a few punches that Trunks threw. And Cell was powering up during their battle, and Android 16 acknowledged their strength in the fight.
I'm not saying that Cell can't beat Trunks in a fight, but I'm saying that if they had an arm wrestling match, Trunks would win.