Exactly how does reading on an ereader slow you down? When I'm reading, I'm using my stylus to 'underline' the sentence I'm reading, and it feels quite fast.
I can't really say if I read more now that I have an ereader, but it's much more diverse. I used to read fiction, and school textbooks. Now I read a lot of non-fiction books that I find interesting, but that are unavailable in the local library and very expensive to buy in bookstores.