India will not make a child available for international adoption before age 6 months (and usually they're even older than that). Then there's the NOC certificate, scrutiny hearing, court date -- all of which takes months. I'd say it would be very unusual for a child to come home before 15 months, give or take a month.
You can get more detailed information here:
http://www.cara.nic.in/
Our daughter came home in 2003, just about the time they CARA (the adoption authority in India) was becoming very strict about making sure children had been offered to Indian couples in India before they qualified for International adoption. DD was referred at almost 10 months and came home at 18 months. She was a toddler, not a baby, but she was loved and well cared for in her orphanage and is now a happy and very healthy 4 year old.