Quote from PivotBlimpThat wouldn't be fair at all if only some contestants got a nicer judge.
Agreed. People could keep asking for new judges until someone scored them highly.
Seeing all this talk about scores, I'd like to point out that there up to the judges personal rating method so variation is inevitable (some people will never give out a 10 for example). So long as the judge scores everyone the same way (averagely high or low) then it will still be fair. Stuff like this has been around since version 3. There's just a lot more people drawing attention to it now.
And thanks FL :D