I wouldn't call 4,000 on the slow side at all. I wrote 6,500 words last week, 26 manuscript pages, and I thought it was pretty good. If I'm ever in a position to be a reallyo trulyo full-time writer, I'd like to increase my output, but in the meantime I'm happy with where I am. I mean, I started my WIP in its current form around Feb. 1. I'm over 100,000 words now, and unless something seriously derails me, I expect to have finished the rough draft by 10/31 and have it edited into respectable form by 12/31 or 1/31. That's a longish novel (I'm shooting for 125,000 words) in a year, which I think is pretty darn respectable for anyone who's not in a position to write fiction full-time.
I guess I'm just over-worrying about my typing speed. I'm a two-finger typist. Typing the way you're supposed to just never felt comfortable to me. My speed is good, but I miskey a lot because of the whole two-fingers thing, which means, of course, I'm slowed down by having to go back and fix things constantly.
On the other hand, I suppose if I were a faster typist, my "creative speed" might not be able to keep up and I wouldn't be churning things out any faster anyway.
I'm shooting for 75,000 or so words for this, as it's my first real attempt at a novel (though it's a complete rewrite/re-imagining of a book I wrote 10 years ago that was highly derivative and was never meant to be submitted for publication, so it's sort of my second attempt) though the story will be done when it's done and I'll worry more about word/page count when I go back to revise it. If I can keep up the current pace, I should be done with the first draft sometime in early December. Which is kind of daunting to think about on it's own, for me, as I've never been one for long term planning and the like.
I have no idea what the revision and editing process is going to look like. It should be scaryinteresting.
But for now I'm just enjoying writing steadily and feeling like I'm accomplishing something.