I don't have any gaming achievements to prove my theory, when I first tried out blues for gaming I thought I did a big mistake. They feel "clumsy", once the key is pressed completely down it needs to go all the way up again before it registers a keystroke, thus making micro-dodging, strafing left and right quickly a bit messy at first. I'm going to assume most of my issues were related to me not being used to tactile mechanical keyboards. After a while, I played better with blues rather than brown because the general feel was much more familiar.
Final consensus: Blue switches are great for gaming but certainly not for everyone, takes some time to get used to the keystrokes.
Edited by Anhedonique - 11/7/12 at 7:31am