I think this is a fair indicator. As suggested, things like class size, and school history also plays a part. For example, Fuqua (#12 on your list) only started in 1970 with a class size of 20.
I think a better indicator of current situation is to look at the latest employment report. Even that is misleading, since some school's student population is less consulting focused.
IMO, if your school is in the core school for the company you are recruiting for, you should be fine.
Also, GMATClub discussions focus a lot on consulting and ibanking; however, consulting and ibanking isn't the goal for every students. I find that many of my classmates actually shy away from consulting and ibanking in favor of management and marketing for the work/life balance. In fact, the General Management Club and Marketing Club are two of the largest and best-run clubs here at Fuqua.