That should be a good thing right? At least the way I read is: "undergraduates college maps to normal demographic distribution" which should reflect the result of more access to higher ed
I'm not spelling out what that means here but this study reflects what you choose it to reflect and that's not always good. Or maybe it is... again depending on your perspective.. and your gender.
This study is also too general. Some universities that are selective and actually have higher IQ students.