It's just like the shebang about the reviewers giving wii games bad scores.
For a lot of the people who've been gaming the past 10 years or so, the games just don't seem to be on par.
Sure the games are still good, but if you want the opinions of people who are starting on the wii and don't have the last 10-15 years of gaming to corrupt their bias, you're going to have to wait until someone cares enough to publish them.
I've said it before, it's a paradox. The casuals aren't interested in writing video game reviews. (I mean this in every good way possible, it's not a dig, just being clear) That's the problem.