Actually, you might be surprised. Kids who are at an elite level of a sport (I would call the girls who dance on this show athletes, as well as artists and performers) often do well academically, simply because they are by nature driven and perfectionists. Parents play a huge role, of course, but it's extremely difficult to strong-arm a child who really doesn't want to dance, play hockey, etc. There are schools that accomodate these kids, plus I guess a parent could hire a tutor. Where I live, athletes are given school recommendations by their coaches and clubs. For instance, there are a couple of high schools that accomodate hockey players - the kids do schoolwork till about 2pm, then spend about 4 hours afterwards on the ice. This is in addition to regular team practice and games. It's not an easy road for these kids - they have to want it badly and love what they're doing.
My kids are certainly not at that level, nor do I expect they will be, but as an involved parent I do spend time with kids who are. They are exceptional (as are the parents). Actually, they scare me a little bit.
It can be difficult to parent a child like that, because it's hard to know if you're doing the right thing by limiting their school and social time so they can work on their talent. The Dance Moms mothers are very over-the-top and I hope the ridiculous drama is confined to the bits we see on the show...but I understand there is stress when you're parenting great kids as well as troubled ones (or just average ones ). The real problem with this particular group is Abby. Great coaches are passionate and demand the best effort from their athletes, and all I have seen from Abby is anger and volume. If this group of kids flourish, I believe it will be mainly because of who they are - not because of Abby's training.