Very true. But i think that's a reflection of the type of partner he often gets. He gets the talented overachievers. They come in both good and confident. He knows that, and pushes them because they have the talent to be pushed. Once they know they have the talent, that ups the pressure they put on themselves. When he was paired with Sherri Sheppard, I don't recall her crying much, because she was just happy to be there. It's the high achievers like Zendaya and Danica - but they are also the ones who have expectations on themselves higher than Val does.