Just 2 quick things:
1. If you're recruiting for MBB your resume will get tossed without a 700+ (bare minimum) GMAT. Maybe you can sneak through at Booth with something around there, but at Georgetown you'd realistically need something 720+ to turn a recruiter's head. That being said, I think the MBB obsession is completely absurd at B-school. You'll get a similar experience at the Big 4 (Deloitte, PWC, E&Y, KPMG), highly regarded specialty shops (Oliver Wyman, L.E.K., ZS Associates, A.T. Kearney) and plenty of others without having to kill yourself in the process. I just think everyone is so wrapped around the axle with MBB that it creates this feedback loop and people forget why they're fixated on those shops in the first place.
2. The mean salary for graduates is a terribly misleading stat. I'll be working for an aforementioned consulting firm with a higher salary than my classmates working for a MBB firm (and their offer is a 'class offer' so it's the same for the folks at HBS as it is at Vanderbilt). All median salary tells you is that: more students are going into banking and consulting than marketing, HR, and non-profit; and they're accepting positions in more lucrative markets. Georgetown may have a significant number of students going to government positions, which would bring the average down. Vanderbilt (just an example of something I know) is a leading health care program in the health care capital, and those jobs tend to bring down the average since hospital administration pays less and Nashville is a cheaper city.
Just my perspective as someone who just finished the whole process.