<p>DunninLA-
Good point. There are some disadvantages to having a more "diluted" student body. If you stay away from the football games, you can avoid most of those disadvanteges. </p>
<p>But, there are also advantages to having large numbers of very bright students. The culture of a school tends to be dominated and led by the most talented, like the culture of our nation. Having greater numbers of talented individuals adds to intellectual diversity, cross-fertilization of ideas, potential for new ideas and original discourse, potential for growth. An extreme example of a college with high average SATs: imagine being at a college with two students, you and Einstein (or whoever). Even that could grow stale. At the same time, large numbers of talented students increase your ability to find intellectual and social soul-mates. You simply need a critical mass of such talented individuals for all these things to happen.</p>
<p>A larger number of talented alumni will create a stronger alumni network and maintain/enhance the reputation of your school with their contributions to society. In classrooms, the questions and discussions are elevated to the level of the brightest students.</p>
<p>In second and third tier schools, the bottom 25% are gone after the first year or two. In the elite schools, even the bottom 25% are bright enough to succeed but I think they are elevated to a higher level as the years go by. I recall a student being admonished by a Professor freshman year for asking a "stupid" question. (Most Professors are more patient than that.) If you are in the bottom 25% at an elite school, you will succeed and probably grow intellectually and socially more than any other quartile. I have heard more than one person say that Cornell takes away your self-esteem and then gradually gives it back to you. Students who were outstanding in high school find themselves working hard to keep up.</p>
<p>Furthermore, I think you CAN choose with whom you associate after freshman year. You get to know other students in your major and you can take courses, work on projects and problem sets together. Everybody chooses their roommate and/or housemates. You decide which organizations to join, which activities to do, who to eat with. Most of all, school is fundamentally a solitary enterprise. You are the one who has to study and learn and take exams and write papers. Education is not very social. Everybody spends a lot of time alone with their books.</p>