No it didn't. Well, not unless by "won" you mean "came second". It takes a very strange way of revisionist thinking to misinterpret a podium, surely? The D300 is the best APS-C camera on the market, that's clear, and the 5D is not the best full-frame camera on the market. In fact, it's probably the worst. It's not got the fanciest tricks in this group test, either. But for actually taking pictures, it wins in this group - that's the outcome of the review, and I'm astonished that even the most ardent D300 fan could misread the review to come to any other conclusion. As with any review, of course, that doesn't mean that it holds good for everyone. For those who really need more than 3 fps, one of the other cameras is more suitable. For those dedicated followers of fashion who have to have the latest gizmos and aren't fussed about the best image quality for the money, one of the other cameras is more suitable. Theoretically, those who shoot in bad weather might be better suited with one of the other options, but given that mine has survived in pretty bad weather, I rather doubt it. And of course those too idle to clean their own sensors would be better served by finding another hobby camera...
Seriously, the 5D is not for everyone - probably just the vast majority of keen photographers.