jamin: Commuting to ORD can really vary. With two major airlines with big hub systems translates into a lot of options. Sometimes this makes it easier and sometimes harder (more options can mean more commuters). If you live in an Eagle CRJ base its cake since you get priority over the offliners and the CRJs are almost never weight restricted (only ever seen it once and that was a fluke).
Hope this helps, if you need something more specific let me know.
As for the age thing, expect to see younger folks as May rolls around. Plenty of people coming out of the collegiate community both as graduates and instructors coming off of contracts as the academic year comes to a close. For those waiting to apply or interview, PM me if you have any specific questions.