Congratulations, and all the best for the interview!
What you said about interviewer availability is quite possible, and would make sense too!
I'm located in Chennai, India, so I think it would definitely take much longer to find an available alum around here (if they can find anyone at all). I first thought of opting for Bangalore as I felt it might be easier to find an alum there, but then the potential prospect of having to make a day trip >600kms on a weekday/take a couple of days off from work didn't seem realistic.
coltaylo94
Received an interview invite with an alum last night as well! I'm located in Atlanta.
Looks like they released invitations in a batch based on interviewer availability.