Talking about BITS Hyderabad CS. In my batch (and branch) around 90% were getting a seat in IIT (<10,000 AIR) and quite a few of them got exceptional ranks (<4,000 AIR). Four to five people here even got around 1000 AIR. Almost 100% qualified JEE Advanced (<20,000 AIR). They couldn’t get the branch of their choice in top IITs and hence chose BITS. I’m not sure of the other branches but I think a significant number of them would have qualified JEE Advanced.
The peer group in BITS is definitely better than most of the IITs on an average although there is more variance in IITs which may or may not be better.