It felt like it took a long time for the old guard to swing around to a touch-first interface after spending a decade or so building interfaces meant to be navigated with arrow keys below the screen.
Once the iPhone was revealed, everyone else had to scramble to catch up in real time, and many of them tried to just half-ass it—or, as the GP says, just weren't used to the paradigm and took a while to figure out how to do it well.