GeekDavid
Auror
Secondly, I don't share anything now that hasn't been written in full and received at least a revision or two. I don't want feedback on an incomplete piece. I want feedback on what I feel is really close to ready. Then, and only then, are readers valuable to me. Then they can spot the things I gloss over. Then they can contribute toward making my story better. Also, only then will I feel that validation that the story is good because I know I've put the work in.
I should point out that DWS does support and encourage using what he calls "trusted readers" to look things over after it's done... but he stresses the "after it's done" part.