There are several misconceptions about B-Schools among the general public, mostly about placement, alumni, faculty, and brand value. There are several excellent institutes in India for management courses, and all the institutes mentioned in the question are among those.
The points below give some overview about the mentioned institutes:
Therefore, these institutes are in no way backward than the so-called crème de la crème institutes like IIM A, B, C, L, XLRI, and FMS.