I had heard,as Mx5 mentioned, that fine motor skills come later for boys. I know my boy is only 3 1/2, but I remember some one's advice (I believe it was on this board) about the handwriting being a subject better left to later because boys are late bloomers.
I noticed that my daughter already holds a pencil and crayon properly and I didn't take time to show them how. She just watches and does it. She's just over 2.
I find the differences in development fascinating. There are somethings we just have no control over. Guidance, yes, but complete ability to change-not quite.