To judge by the audience response to V/M at world's, I don't think D/W can be seen to have taken a really definitive lead .OTOH, I wouldn't classify D/W's win as a default win. Tessa was barely back from injury , so we don't know how much better they could have been with more training time , but Charlie and Meryl 's material was not as perfectly suited to them as has been the case in the past. We've known these couples to be very close for years , so assuming both stay healthy (knock on wood ) we're right back to it being a brand new game every year.
Earlier , on another thread , doris made the excellent point that whether you think D/W nailed the Tango or not , the work they put in to perfect the dance will keep paying off for them in the future. I'm quite sure this is true. And if Tessa's medical problem is truly behind her, V/M also have the possibility of progressing .Goodness knows what perfection we've yet to see. These two couples are so good , so young and they're bound to be forever linked in the history of the sport.