Well, I was going to write, "Sadly, yes..." but then I realized that it's not sad at all!
I picked up the Twilight book for the first time very shortly after I watched the movie for the first time this past summer (whenever it was that the movie came out on DVD). Of course, after that I had to get the rest of the saga. And I've just been reading through all four books continuously since then! I wait for a day or so when I finish BD, just to let the story sink in fully, and that's as long as I can go without having their story
in the forefront of my reality. It seems sick to me, but I don't want an intervention.
It takes me about two weeks or so to read all the books, so I've gone through them a lot.
So yes, my reading habits have changed significantly in that I read exponentially more now, but the same thing over and over. And (this is where the sad part comes in) I know from experience this addiction will run its course through well after the release of all the movies.