That said, Google was lucky that there was a loophole in the patent definition. Imagine a world where Apple had actually obtained an airtight patent on a system that listens for single- or multi-touch gestures and switches between scrolling and pinch-to-zoom appropriately (which is essentially what the patent in question does). So, you'd be free to implement pinch-to-zoom as long as it doesn't infringe on that. Good luck.
(the point here being that, de facto, Apple would essentially have a patent on pinch-to-scroll. In real life [not in the proposed alternate universe] this is almost true -- there are loopholes, but you have to hire a patent lawyer to find and/or confirm them).
I'd rather not, lets just stick to the facts and not build strawmen. It's bad enough to even discuss pinch-to-zoom or rounded rectangles when that's not what the trial was even about.
If we're discussing the Apple trial, lets figure out what really happened, not just repeat what we read from the press.
You can read that patent here: http://www.google.com/patents/US7812826
And, even thought that patent was _not_ referenced in the case, you will see it's a particular multi-touch behavior _associated with pinch-to-zoom_ that apple is claiming a process invention against, not pinch to zoom. It's actually quite clever.
See: http://www.theverge.com/2012/8/30/3279628/apple-pinch-to-zoo... for good details on this myth.
Note - others have patented Pinch-to-Zoom far before Apple came to the stage.