I think you're underestimating Dornbush and Miner. Just because they're young doesn't meant they can't bring it. Dornbush has brought it all season long in the junior circuit and has the 11th highest season's best as a junior. Miner started slow, but he's really shown that he wants it and will take the opportunity.
Well, in this case, you should also pay attention to those skaters placing immediately behind them. They include some fairly well known names and have arsenals that could easily topple all 3 American men in the FS given how close they are.