Maybe I'll change my mind once I've gotten a bit more time on an iPhone 4 with the retina display and an alternate browser - I hate mobile Safari. It's in the way when you don't want it to be and then when you need something from it, it's missing or a PITA to use. Webkit page scale rendering is also fairly shite - it introduces a lot of broken seams and odd font sizing. On the desktop version of the browser the fonts don't tend to be an issue, but the seams are still there on things like adjoining graphics, etc. Firefox didn't have that issue when I last looked at it.