B-School ratings are a myth.it is true. I am a MBA myself. I know of one instance when one of these magazines came to our school and asked the B-school management for an advertisement subscription in their magazine for 10 lacs. They said if we wnet and place the ad then they would give us a good rating.
This is how the thing goes. I remember in one year an institute like IIPM was ranked higher than IIMs. Folks it is all marketing. We should not believe these rating after all.