Internationals don't (or aren't allowed) apply in later rounds because it is difficult to arrange for visas, loans, housing etc. In addition, I haven't seen any international (read resident Indian) get in from the WL this late. Having said that, I haven't seen a lot of them convert the WL as well.
My 2 cents: gear up for the next cycle if you are still interested in MBA. In the meanwhile if Tepper does admit you, rush in to complete the formalities (keep your basic stuff (documents etc.) ready). also, you may talk to a few Tepper alums/current students regarding this.
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