bogolisk -- Well, I think it's more that Tessa, with her primary, nearly lifelong interest in dance, adapted to the practice quite readily; also, at the risk of sounding stereotypical, it's likely much easier for a girl to take to expressing romance in a program without feeling slightly ridiculous or cheesy about it. It might be a bit less natural for a guy's guy like Scott, and so it's something that he had to learn as they moved into the senior ranks, and become comfortable with -- presenting himself as a fully-expressive romantic lead on the ice, even as overdramatic as that might have felt.
Is that a good wow or a bad wow, Mo?
It is really interesting to actually see that stage in their physical development, isn't it -- where she was catching up to him and he had a few years to go before filling up and out as he has since (not that he's tall now, but he has a few good inches over her). It's great to see how they navigated that, because you know that was their only choice; they were never going to seek out other partners. Not an option, and somehow I doubt they'd have been willing to end their career over height issues, either.
(I've always found it amazing, all the same, how everything sort of fell into place for them in that regard, though; Tessa ended up the shortest in her tall family, and Scott grew to just the right height to make a perfect match with her for lifts and general aesthetic appeal. They're quite a pair.)