I think that Valve is an incredible company, but are they really #1 developer?
Mojang is cool in my book, but not long enough in the game to be #2 - they have 1 smash hit out, and Riot games is the same - what the hell were the priorities when creating this list? Revenue or actual game developing skill?
I still think that Nintendo EAD destroys everybody when it comes to create actual games - yes, they've been playing it safe for the last games, but I think they'll prove with their next big Wii U game why they have the best reputation among developers. I think they are the most capable on that list.
Oh, and seeing PlatinumGames at #4 compensates the fact that CD Project RED is missing from that list.
EDGE.. mhm.