Wow. I believe it. I know lots of people who do. I am definitely not one of them.
There is apparently a narrow window of time that you can ask a child these questions....that they are capable of giving an uninfluenced answer...and that most children at this age, can remember their life in the womb and can describe it. But if the time that the child is able to answer these questions passes unquestioned, the memories will pass as well.
I was hoping someone knew about this.