Actually Pittbboi you are dead wrong, Sony and MS have both openly stated their consoles are for those in the upper teens to mid to late 20s. They don't claim their consoles are for everyone, heck even MS recently said when gamers get past their early teens they will want to buy an Xbox 360. What is sad about your ramble, is that Nintendo has openly talked with developers like Rockstar to get their games, to me that is speaking out when you are talking to one of the most controversial developers around WANTING their games.
What I find quite sad about this is that individuals, like Pittbboi, were praising the heck out of little big planet which is about as cartooney and "kiddie" as you can get in style, and when EA tries. it is reaffirming a stereotype and Nintendo is at fault (then again I have to realize some of these individuals looked right over Super Paper Mario at GDC, even though it is perhaps one of the most unique and innovative games to come out in awhile). We need to realize the Wii is going to be a console directed more on the mainstream and yes CASUAL market, along with a mixture of hardcore games, and that means game styles like this in addition to the Godfathers, Zeldas, and Red Steels.
Games sell well with this kind of art style on Wii, that is a FACT, and I think people are being a bit too harsh with EA. This is the same company that gave us a polished Wiiport of The Godfather, so obviously they don't consider the Wii base all "kids". In my opinion, I think EA was stating what they see as true through sales, and that is Wii's age diverse userbase can relate more to the "cartooney" visuals, as seen in Wii sports, especially in conjunction with the Mii feature. Personally I don't mind the cutesy visuals, because I've found they create a better enviroment to have FUN in when it comes to what can be done with emotions or actions (as can be seen in so many Nintendo games).
With that said, Nintendo has done alot to try and change the kiddie image, and frankly they are succeeding with the Wii which has one of the most diverse userbases around. No longer do you hear Wii is a kiddie console, and that shows me quite a bit. To say that Nintendo hasn't done anything to change that opinion is ridiculous, yes they have their own philosophy and most likely won't change much (though they are creating some new franchises are are more mature looking in style), but they are also trying to court "hardcore" and more mature game franchises from 3rd parties as well, it is up to the gamer, NOT NINTENDO to support games that are not of the "cartooney" style. If they don't sell then you won't as many mature style games, that is not Nintendo's fault but the fault of the market or consumer (if the game is a quality game of course). Nintendo has done alot to get these mature looking games on Wii without completely changing who they are, and I think it is up to us now to take it to the next level.