I've think about this subject as well, trying to give myself an input advantage in games like Super Street Fighter IV: Arcade Edition and CS:GO, and i've come to the conclusion that the only logical answer would be : NO
Logic explained: It's not the input device that makes the player better or anything, as long as the player plays on the same device everytime. Why for? Because you personnal comfort is a much more important factor than some lower actuation point, and when you get real good at a game, you'll have what i may call "input memory" on this certain device and you will be able to execute flawlessly what you meant to do by habitude.
There is no unfair advantage into different mecanical switches (yes, Razer lies, i can confirm) but i would defenetly say that there's a legit advantage of having a mecanical keyboard when playing very input-dependant games, just because reliability comes in.
Also, just my two cents here, i strongly believe that the "best switches for gaming" (Yes, re-oppening the debate here) would be those with feedbacks, either clicky or tactile, just because feeling that an input is registered/unregistered was a huge difference for me in CS:GO especially. Just like TacticalStache said (smartest/wisest homie imo), "floating" using tactiles switches can defenetly turn to be advantagous when it comes to repeating an input based on your reflexes (like shift-walking in CS:GO to walk over specific material versus running on some others when they are mixed, or double registering the "q" to ready yo AWP faster after a good shot)
Hope you learned something from me, but don't forget it's opinion-ish only. Have a good one homie.
Peace.