I don't know that the Blackstone PE folks have all gone through IB arm to work in Asia or US. I will research that; I know a number of them just have to dig out the contacts.... it just seems a very circuitous way for no specific reason. Why?
I would do a few things:
1. Research your companies and see if you can spot a pattern
2. See if any of them have gone to Booth, Sloan, Yale, or Insead
3. If they have, contact them and tell them about your dilemma - it is a perfect networking informational interview opportunity. They may even offer you to get in touch for internship next year. it is very low risk for them, and many would love to talk about their career.
P.S. I am still going with Sloan/Booth. I can't see Yale outplacing either of these programs by a mile. There is a not very exact but generally telling ranking of MBA programs by industry that
US News does and to give you an idea, Booth is #2, MIT Sloan is #5, and Yale is #39. These rankings are not precise but they give you a bit of a perspective of how much attention finance gets at Yale. You can do some LinkedIn research but even looking at the stupid employment reports, the base salary range for finance, the high marks are:
Booth: $250K
Sloan: $230K
Yale: $175K
Don't you think it is suspicious for a program to be ranked #39 in Finance and have the lowest base salary for the top finance placements? Perhaps this does indicate it is a notch or two behind the other two programs?
I have nothing against Yale but it seems to be the weakest of these programs in the US in any Financial area, esp in the high end of the IB, asset management, and PE.