Just wanted to let everyone know that I googled my own question and here is the result:
The freezing process does not kill any significant amount of the cultures—in fact, during the freezing process the cultures go into a dormant state, but when eaten and returned to a warm temperature within the body, they again become active and are capable of providing all the benefits of cultures in a refrigerated yogurt product.
I started thinking, after I posted this question, that if they can freeze stem cells and embryos and theoretically, even human beings, why can't bacteria survive the freezing process?
Good to know. Sorry I gave you wrong information. Everything that I had read said that freezing killed the active cultures. I'm glad you found tha because I like frozen yogurt better the the chilled type.