Yes, compared to *some* buttons (Ahem! Cough! Cough! Kindle! Cough! Cough!) the page forward/backward buttons can be a tad unresponsive - by comparison. I *LIKE* the bit of stiffness to the buttons as I'm not accidentally paging-paging-paging-paging with every breath and jiggle of my hand when I'm holding it one-handed. However, *some* people seem to prefer a button which registers a depression whenever a butterfly in China flaps its wings. Go figure. Either you'll like it, tolerate it, love it or hate it. That's about the best I can offer you as you'll really have to see for yourself.
But yes, it is *NOT* as sensitive as a Playstation controller.