I have a question: Do Atheists have less dream recall than religious people?

It sounds like a strange question and I don't want to offend anyone, but I am a Christian and have always been able to remember my dreams. However, my girlfriend and her brother are Atheists (they are also from Vietnam- so maybe culture has a big deal to do with dream recall) and they can only remember about 1 dream per month. I always thought that everyone was like me (in terms of dream recall) until I met them. A lot of religious people I know dream quite frequently and can remember there dreams.

They are the only atheists that I know, so I was just wondering if there were any Atheists on here that could relate to them.