I don't know when it has been introduced, or even if it was always there and I didn't notice, but iBooks also supports continuous vertical scrolling and it IS much faster than looking at an animation that shows a page turn or a slide. The default mode, "page turn" doesn't make any sense. When I scroll through an ebook through the continuous scrolling, the text appears INSTANTLY, without a perceptible delay and since it's continuous scrolling, you don't go from a page to another, but you're always "in between". The concept of a "page" 1, "page 2", "page" 3 itself is no more. It's not a physical book, it doesn't need pages.