Well, the discription for Fake Out is "1st Turn 1st Move, might cause flinching" so the quickest move is Fake Out IMO. So even though say.. Your battling against a Lombre that's in level 30, and your Blaziken, which is holding a quick claw in level 90, with the highest speed stats possible, and uses quick attack, and the Lombre uses Fake Out, sapposably Lombre will attack first and Blaziken will end up flinching..
I can't claim that it's true, since I never had the chance to try it, but that's what it's sapposably sappose to be doing.. (if that made any sense)