I wish some university would get a government grant to study why people invariably read more after getting Kindles.
I have always been a big reader, but I am definitely reading more, and more quickly. I swear it has something to do with the Kindle presenting you with that one snippet of text at a time, just one page -- nothing else to distract your attention. It reminds me of when I was a kid in school and the teachers used those readers that projected just one line at a time on a screen for us to read. (Okay, I'm sure I'm showing my age here.) The object was to get kids reading a certain number of words per minute, I believe. Since you got only one line at a atime, you weren't distracted, and you couldn't read back a sentence or two if you missed something. And I guess the Kindle is something like that, although of course you can flip back if you need to.
But I find myself developing such a nice rhythm -- read, next page, read, next page, that I just fly through books.