Over the years I've actually done the opposite. I'll read reviews on books I'm interested in on Amazon and go to a local bookstore to buy it. I appreciate the book reviews but I'm impatient and want the book now.

The iPad and iBookstore have changed my behavior slightly in that I can both read the reviews and buy the (e)book at the same time. I'm still buying mostly physical books because I love the weight and feel of books but I'm starting to gradually switch.