re: What % of LSU students are equally as intelligent as the average Ivy League student?

I went to LSU and an Ivy for grad school. My observations were that the top 5 in my class at LSU could hang with the top at the Ivy. Also, the bottom 5 in my Ivy were almost as worthless as the bottom at LSU.
The difference I noticed was the fat middle part of the distribution... the kids in Ivy were just smarter and cared a lot more than my LSU cohort. I found the Ivy curriculum more intellectually challenging and broad. But they also weren't distracted by football.