Alright fine, I'll test it out for real. 2 solves. Without inspection. On a 5x5 even. With the same scramble.
Petrus: 26.43
Fridrich: 38.78
I think that's enough to prove my point beyond doubt. There's no way that fridrich is sooooo much better than petrus that even someone who doesn't use it as a main method would do faster because it's soooooo hard to make a 2x2 and cross is sooooo fast.
Edit: just in case you somehow think it's still debatable...
Petrus: 28.96
Fridrich: 40.86