ESRB Ratings Across the Consoles Charted
Gamasutra has up an analysis by Matt Matthews looking at the distribution of ESRB ratings across several generations of consoles. He makes particular note of Nintendo's efforts with the GameCube and Wii: "On the GameCube over 51% of the games were rated E and 6.1% were rated E10+. This makes the GameCube appear to be more friendly for younger gamers ... From the beginning Nintendo has wanted to attract non-traditional gamers with its Wii hardware and software. Perhaps as a result of the manufacturer's strategy, many Wii games have been designed to appeal to -- and therefore are rated for -- a general audience. Over 82% of the Wii catalog is either rated E or E10+. Only 3.2% are rated M, less than half the rate on Nintendo's previous console, GameCube. Still, that 3.2% is significantly higher than the rates on either the Nintendo DS or the Game Boy Advance." Matthews makes a few offhand comments about the analysis on the Curmudgeon Gamer site, as well.
I bet Wii has to be more careful about the type of games it allows. If you had a ninja assassin game where you have to pantomime garroting a guard with the controller wire, it might cause parents to get upset!
"If you think you have things under control, you're not going fast enough." --Mario Andretti
One thing that has confused me on the "E" rating is that for some reason boxing isn't considered violent. In Europe its a 7+ game but in the US its "Everyone". Now sure talking a shotgun to someone's head is definately at the top end scale of violence but surely pounding someone's head with your fists even after they start to go down is pretty damned violent too.
Now its not an M, but is punching people in the head really "E"? Even if its done cartoon style?
An Eye for an Eye will make the whole world blind - Gandhi
Because the 13-18 crowd is the largest audience by far for "17+" games. People who are actually "mature" tend to find most of them less interesting.
Because that's the -rating-, not the audience. Teens buy M-rated games. Whether they do so directly, or by fraud, or by getting someone else to... It doesn't matter. They buy them.
"If you make people think they're thinking, they'll love you; But if you really make them think, they'll hate you." - DM
...and give us the statistics on the percentage of overall sales for a console by ESRB rating. "M" rated games may be a smaller percentage of overall games for the PS3 or Xbox 360, but I'll wager that they account for a large percentage of the overall sales.
"E" is somewhat the equivalent of "7+". Despite the "Everyone" designation the low end rating is actually "EC", Early Childhood.
In terms of why I think it mostly has to do with societal norms. There's isn't a perfectly objective way to rate content, just can't happen. As such ratings generally reflect the conceptions of the society they are in. That is to say what people would generally consider acceptable at a given level. This is also why nudity gets hit so hard in US ratings systems. The US has always had an issue with nudity (look in to the people who originally settled the US if you want to know why) as such it gets rated harsher than it might in other parts of the world.