I am no senior, but i can answer your question.
See the companies which recruit from IIM,XLRI,FMS, they go there with different set of pay packages and profile, then which they offer at tier 2 colleges like LBSIM or others.
So generally there is no overlapping between the offers made at these two categories, so placement wont get affected here.
But with opening up of New IIM, will surely affect MDI,NITIE,JBIMS and likes, not in a regular way but it will affect the top offers slipping out of their hands and going to IIMs.
Just a Thought came to mind so wanted to share...Will Opening up of New IIMs last year and few more this year will it affect the Placements of the Colleges like LBSIM and also similar ranked ones..It maybe a far fetched Question but a Question no Doubt I am Gonna join LBS 2011-13 Batch in Gen Category...