Forbes has "ranked" business schools by their potential return on investment:

http://www.forbes.com/2005/08/16/best-business-schools-list-cz_05mba_land.html

I'd say this list is pretty similar to the rankings at Business Week, FT, etc. Coincidence or conspiracy?

i don't think it is a conspiracy - it is just that the return on investment parameter plays a big role in all the major ratings, hence the similarity.