Or maybe "Of course Ford did forget to include tail fins on this particular model". I don't think I've seen oblique, sans serif type used in an iOS user interf

Or maybe "Of course Ford did forget to include tail fins on this particular model". I don't think I've seen oblique, sans serif type used in an iOS user interface. Content, sure, and Helvetica is there for you, but this is the system user interface font. I think the clarity demanded of the system user interface argues against the subtle change afforded by slanting the font. Oblique sans serif fonts are generally sort of an apologetic placeholder for: "Here is where I would have used a nice italic font, but my type designer couldn't pull that off in this clean, minimalist font, so please imagine that he did."