Every year these come out and every year it gets me all fired up for one reason or another. Supposedly the average salary actually dropped compared to 2005. I'm sure profits for games probably went up though.
According to Game Developer magazine - it breaks down like this:
Business & Legal: $95,596
Production Personnel: $77,131
Game Designer: $61,538
So as you can see - testers have it the worst off. I think this is pretty much widely known and if not, sure in the hell should be. Testing is a terrible job.
However - a game designer, such as myself - I am the 2nd lowest on the food chain. Sweet!
Also according to the same survey - only 1 out of 3 can afford to own a home.