It's a pretty slick system - we are starting our 14th year straight of working together so I pencil specifically for Rachel to ink, she knows what I want and I know what she will do and if she has a question I'm only 20 feet away. And then I scan and clean the inks myself and make any changes there. On our actually interior work, I actually do some inking, usually to clean up my unclear pencils! And with covers, I'm coloring those myself, so I leave out even more stuff in the pencil stage as I will do it in color stage.
If I was penciling for someone else to ink, the art would much more tight. I think I produce much better work in this system as I can concentrate on the quality of the drawing as opposed to wasting time make my pencil lines perfect.