Game Console Languages

Is this true?

PS3 games are written in C++

Xbox 360 games are written in C#

Their OS's are written in C

Is that the case? and if it is, why are they the best for the job they do?

"I PLAY HALO ALL DAY ThEREFORE I WILL BECOME EPIC WORLD FAMOUS GAMES PROGRAMMER"
It's amazing how widespread that belief is, when, in general, they can't name any WORLD FAMOUS GAMES PROGRAMMERS themselves