First of all, I think Wiiware has had good games so this isn't a negative to the Wiiware service.
However, I think that the reason there's certain Wiiware games (and as someone said, certain GC and PS2 ports) showing up as being higher on the 'metacritic' polls than most regular Wii games is not because those specific games are inherently better than the rest of the Wii library. Its because the vast majority of the 'gaming media' has a bias against the Wii library. And it has been shown time and time again the regular Wii games get downscored for petty things. Whether it be graphics in comparison to the 'HD systems' or the arbitrary scale of 'innovation' (either too much or not enough) or this notion that a Wii game has to confirm to unique rules such as using certain controllers and/or target certain demographics.
In short, many Wii games are not scored in the same way other games have been, either in the past or other games currently are for other current gen systems. Yet they are ultimately judged next to those same games, such as past PS2 games or current PS3/360 games. It is a unmentioned double standard in the gaming industry which is ultimately causing all but the most hyped and popular Wii games to get downscored. And as a result, trying to compare metascores is practically meaningless.
Six upcoming games you should look into:
