I have asked this of several people, and all the writers I have asked, male or female, have denied that they do. But I, a mere reader, disagree. There are exceptions to every rule – Memoirs of a Geisha, anyone? – but on the whole, I always think you can tell whether the writer is male or female.
I’m not saying one is better, either – just different. A male writer is (usually) more focused on direct action, plunge ahead narrative. The male writer’s character often has a certain kind of guy “code” he lives by – doing the right thing, helping the downtrodden, etc. I think we are all familiar with the “White Knight” P.I. trope.