No, the main reason they won was money. Sony pushed HDDVD out with pushing the Blu Ray TV ad's.
I'm not knocking them for anything. They did what they had to do and it paid off for them. But it was very rare to ever see a HD DVD ad on the TV. But there was a Blu Ray ad on every 15 minutes.
HD DVD was, in my opinion, the better choice of the two. I own both formats so I can speak from experience on this. I'll keep my HD DVD player, and stock up on HD DVD movies when I can find them.