As far as I know she has never expressed an opinion on it.

What about when you throw IMD into the mix? I'm talking about each school's reputation in German-speaking Europe and of course potential post-MBA salaries. I plan to apply to all three schools plus maybe ESMT.

I think the rankings have your answers.

Of course St. Gallen doesn't suit everyone. Diversity is not valued as highly in German-speaking Switzerland as in some other places, so it's a much better choice for a white German-speaking man than for other people.

It's also important to put wages into the context of prices. If we compare MBA hub cities, for example, Zurich is 75% more expensive than Frankfurt (http://www.numbeo.com/cost-of-living/compare_cities.jsp?country1=Germany&city1=Frankfurt&country2=Switzerland&city2=Zurich). That's why St. Gallen alumni in Switzerland earn 75% more than alumni outside Switzerland (http://www.mba.unisg.ch/files/St.GallenMBAPlacementReport2011.pdf).

I don't think one can ignore the figures from the FT. These are collected from alumni, and the data for HSG was audited in 2013. I think the FT has more resources than QS.

The most promising MBAs remain the top ten international schools.

It's worth noting that that post was from 2013: and while things haven't changed dramatically in the past few years, St. Gallen has moved up in the ranking quite a bit, plus, salaries have gone up, as has the school's rating for international mobility.

Mannheim has improved as well, and is actually ranked higher for international mobility than St. Gallen. Salaries are higher as well.