Well, I think it's becoming a trend that the more "original" musicals have been winning the Tony's. WRF was a blend of that cowboy lore, mixed with the newer age of Broadway that had been emerging ever since then. Just like winners like RENT and Avenue Q more recently, they were both up against the big budget musicals that were phenomenal, but their media wasn't anything new (ie. frontrunners Victor/Victoria and BIG in '96 or Wicked and Boy from Oz this past year). Actually, I think WRF did run for quite awhile on Broadway. I think it's even on the list of long-runs on Playbill, if I'm not mistaken.
And if she'll say, "My darling, I'm yours!" I'll throw away my striped tie and my best pressed tweed, all I really need is the girl...