Touchscreen pinching makes sense. It's undeniably intuitive and pretty gratifying! And now it's everywhere - including places it shouldn't be, like the relatively tiny screen of the BlackBerry Bold Touch. This is like picking your nose with a mop.
The thing about pinching with your fingers is that it requires manipulating the screen with - your fingers. And the thing about small screens is that they're easily obscured beyond the point of usability by - your fingers. The BlackBerry 6.1 OS looks about as inoffensive as ever in terms of interface, but really, the pinch-to-zoom functionality looks shoehorned on here - shoehorned on with a shoehorn that's way too large for the shoe and your feet.