I graduated from Penn in 03. Now I am an enlisted Marine. In my basic School of Infantry class there were 3 other Ivy leaguers including Gavriel, and at least 20 or so who had attended other colleges. Not to mention the number of reservists who were in the process of going to school. Given the Marine target demographic is 18 year olds fresh out of high school, I don't think those numbers are too bad. That is, for anecdotal evidence, anyway.
Thank you for your service and may God bless you and all who serve.