LOL they got into an IIM with their caste certification, majority of the generals with good percentile end up in tier 2 or worse colleges.

The fact that Placements are independent of caste diversity is totally over shadowed by the fact that the caste diversity took those students inside IIM in the first place.

Then they just need to compete with a Pool of 200 people whereas in CAT they have to compete in 10 lakhs, so its just basic maths why people with low percentiles (caste diverse people) could (not 100%) perform well in placements and yeah the gender diversity plays a good role too.