[sluukkonen]

Ah, that's too bad. It would be nice if setting user-scalable=no was all you had to do to disable the delay. And anyway, despite using an iPhone for god knows how many years, I didn't even know that a double tap on iOS scrolls the page!

Edit: I mean double tapping on an unzoomable page.

[jaffathecake]

Even then, I think being able to pinch-zoom is a great feature and gives you some accessibility out-of-the-box.

[sanderjd]

Note that the chrome change from the OP is specifically so that you don't have to sacrifice pinch-zoom to get rid of the 300ms delay.

[kinlan]

You can override the forced non-zoom features in settings.