dancindaughter, I think that the YAGP would be beneficial to attend, it does definately have quality dancing. It is a prestigious competition, not just one of those that any old studio can enter. If you want proof, look at the pictures on the website, they are beautiful!
www.yagp.org
And mom2, there definately was at least one person from the US- I know that for a fact because a girl from my dance school went.