Bourne and Kraatz won junior Canadians their first year together in 1992 and senior Canadians the next year, the first of ten years as national champions except for one year out with injuries. I don't think they ever had the chance to compete internationally as juniors because they moved up so quickly, and it was ten years before they won Worlds in 2003.We are saying a lot of the same things. Not everyone fantasizes about instant success moves from junior dance to senior dance but it has happened last year with enough fans for me to notice. I am not making this up It would be very interesting like the videos shown for singles about junior world champions becoming then senior world champions, to do a similar tally for dance... I would say it is even harder than in singles...
Quickly, when I have a glance.. many of the Soviet era skaters who won junior golds had some successes in seniors but with other partners... even representing other countries. Same with most teams actually from more recent years.
The only names of teams that I recognize... and of course, I may have forgotten a few who won both junior worlds and senior worlds are
Dominina-Shabalin and Virtue-Moir.