Point of note: the pinch-to-zoom failure to wrap text to the viewport is also a feature of some Apple apps -- notably Pages, which is very pretty on the iPhone

Point of note: the pinch-to-zoom failure to wrap text to the viewport is also a feature of some Apple apps -- notably Pages, which is very pretty on the iPhone but fundamentally Not Fit For Purpose as a word processor on those devices, unless you habitually write text in a column 5cm wide. Pages is fine on the iPad's larger screen, which can scale to display a US letter or A4 page reasonably clearly. I suspect the root of the problem is a misplaced prioritization of presentation over content. Probably the right thing to do with graphics, but a really bad idea when handling text-based documents.