Hopefully to finish out this debate ...
I've given only THREE games scores of 10 (Metroid Prime, Soul Calibur II, and Wind Waker), and only because I felt that they were the absolute best the genre had to offer, has wide appeal to gamers outside its usual genre classification, and warrants a "no questions asked" purchase for fans of the genre. That's not to say that when you look back, a game couldn't be viewed as a 9.5 or 9 a year later as better games come out. It's only fair to review a game on it's merits and against what is possible NOW. And like Jonny said, it doesn't mean the game is "perfect", it is simply "the best", which is a moving benchmark every day. For what it's worth, there is only ONE game that has recieved multiple reviews and received what I would consider "perfect" 10 scores, and that was Wind Waker, reviewed by a whopping FOUR staff members. Not a single dissenting opinion there, and that is even MORE rare.
In this case, I firmly believed that Soul Calibur II deserved a 10, being the best fighting game available, appealing to me even though I don't normally like fighting games, and is an easy purchase. Dan felt similarly about F-Zero. As opinions go, I would probably not have given F-Zero a 10 score, and as a result, you'll probably see another review of F-Zero soon. Yes, it's rare that two vastly different games will get a 10 score so close to each other, but it's not like it's the same person reviewing them all. Our staff has varied opinions and tastes, and that's reflected in our reviews. Again, when only Wind Waker gets straight tens from multiple reviewers, that's how you can tell our system works.
But please to realize that 10 scores are not handed out lightly, despite the recent pair of reviews, and I think your list of all our "10" games is acutely indicative of that. Six games out of the HUNDREDS we've reviewed, and quite frankly, I'd still recommend every one of those games to any new purchaser of a GameCube regardless of their tastes. This is why our system works ... if there is a reviewer whose personal slant tends to the same direction as yours, you can pretty well rely on thier reviews. One single review doesn't have to suffice for multiple opinions and tastes. For example, if you tend to like the same games I do, only three games out of the six you listed get 10s. For other reviewers, even less.