My first game of karma I went 14-0-11.
First timers aren't always bad, If you have the basics down, it doesn't really matter how much you've played a champion beyond specific match ups. As long as they say it early enough for the jungle to be prepared for it, I don't see the issue.
I went into a game and said "First time Renekton", do you know what happened? Jungle and mid camped top, we won a game instead of me feeding a teemo. We lost an early mid tower, but me, the jungle, and our mid were so fed by mid game it didn't even matter.
The people who really frustrate me are the ones who don't have the basics of the game down. I STILL see players with 200-300 wins auto attacking minions. So frustrating.