Lich
Mark, again no offense but it's not a good sign that your supervisor doesn't think that you can get in these top b-schools. This is usually an indication that they are not terribly impressed with your abilities. I know you might be pissed at them, but ask yourself how have you distinguished yourself at work?
Theres an alternate explanation - people at my office sometimes look at me like I'm nuts "Cornell? Isn't that an ivy league?" and seem to be shocked at the concept that I might be qualified to go so a lot of them, I think they think, though, privately that I couldn't get in.... but I dont think this was ever a function of my abilities but rather a function of the lack of their ability.
Some of the people I work with go to schools you've never heard of - in fact, you wont even find them using BW search functionality. To a lot of these people, "Cornell" or "Chicago" seem like foreign planets, reserved for some kind of different species of people. And it comes as no suprise then when you realize these people are in their mid 40's and they are at my level, or lower in the company - these are not leaders, these are followers, and theyve made their way to where they are today not through powerful ideas and aggressive self improvement, but rather just by chipping away at the 3% annual raises and every now and then making a move when someone quits.
These are not people who "dont think I have what it takes", these are just people who dont have any idea what it takes.