That is interesting.
What's normal for each woman after stopping the pill is different. I've mostly heard about women going a month or 6 weeks after stopping the pill before getting a period but many women have a wonky cycle or two after that as well.
She probably just didn't want you to panic if you didn't get your next period when you thought you would. Remember if you weren't regular before you started the pill you probably won't be after you come off the pill either.