I do not know the answer to your question regarding the schools you listed. What I do know is that the great academic institution, the University of Texas, has a grad rate less than 50% while CU hovers around 78% to 80%.
Here is the deal that I'm talking about, and I've written this before. The University of Colorado has a scoring system based on GPA and test scores which they use to qualify kids. The standards are pretty rigorous and a lot of kids, in general, do not qualify. By oldest had a 2.9 gpa and 27 on his ACT, not great, for sure, and was turned down by CU. (He made it in after a couple of years at Metro).
However, CU will also allow a small percentage of kids in as exceptions based on things like extra curricular activities and such. This exception is how CU used to get academically challenged athletes in. The school, as a whole, will allow something like 10% of students in.
Here is where the rule changed under GB. Whereas the football team used to be able to include a number of athletes under the overall school percentage, the rule changed to say that they could only allow the percentage of scholarships to match the overall percentage.
So, say we have 20 scholarships and the school has 2,000 enrolees. That meant that 200 kids could be allowed in under the exception thing. If the football team had 8 kids that could only get in under the exception, those 8 came out of the 200. The new rule is that the football team can only allow 10% of their annual scholarship guys to be exceptions. So, out of 20 ships, only 2 can now be allowed in under the exception thing.
I'm not sure what the rules are for the other programs you mention, but I suspect they are much more lenient the ours.