Why wouldn't he with those cubes? Unless you're saying if other speedcubers went that aren't as fast normally...
Matt Wangstall (probably won't go), Or Joshua Li (probably won't go) average sub 15, and when you're using brand new Rubik's cubes, you can't really do fingertricks, and Matt and Joshua's problem, is that they don't manage to turn as fast as Feliks, and still have little to no pauses at the same time. With a storebought, someone averaging 20 with Petrus would even be better, as you would use way fewer moves.
STill, faz will probably win, as the other two probably won't go.