I've been watching this from the beginning as well as the Miami one. The little boy and girl on the Miami show that did a sort of tango, looked familiar to me. Were they not on Dancing with the Stars when they used to bring in really young dancers each week to compete?
It seems to me that Abby's dancers aren't dancing so much as lying on the floor and doing "stretches" and acrobatics. It's dance, shouldn't they mainly be on their feet and dancing?
I was not surprised at all that the Joffrey people seemed to like Chloe the most. She does the most dance (on her feet) of all the girls. She also looks the part with her very long thin dancer legs and overall lithe body.