I honestly didn't use pinch to zoom that often so I don't have anything to compare it to but it's working fine right now. I just tried it in the Gmail app and Chrome.
The funny thing is that this fix is just reverting to an older touch driver.
Any ideas what ROM you'll be flashing or do you just want to root and stay on the stock ROM?
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I just powered up my GS3 to flash a custom ROM my friend told me about and I can't believe how bad the screen is compared to my Nexus 4
The colours are really washed out and oversaturated. It's not like I didn't know this but I actually liked it when I moved from a 4S to the GS3 but going back from the Nexus 4 is a different story.