Careful when listening to statements such as this one. It's way more alarming sounding than it really is to the vast majority of gamers. I have honestly never seen one gamer say the slower response time has adversely affected his or her gaming experience.
I think this con really only applies to..."Professional" level gamers.
No, any FPS players that don't like a bit of ghosting. For WOW, League of Legends and such it would work just fine I suppose.