There is for math (which I think I already told you), and they actually mix kids from various grades, but I'm still trying to figure out what they are doing for language arts. They are asking for a lot of parent volunteers for things like reading groups and testing geography (kids work at their own pace memorizing the world map) so I'm guessing they are doing ability grouping for reading at least and a lot of the material seems to be kids working at their own pace, including math. Which is fine because DD is slow and I don't want her feeling pressured or like she has to rush through work to keep up with those gifted kids who are "fast".
I hear you on your concerns. Last year (different school) each kid identified as gifted got the "same" enrichment packet for math. Didn't matter how they tested. I think they want to feel like they are doing something without actually doing something. It's not well thought out with each kid's unique needs in mind.
