[powrtoch]

This article seems to rest on the totally false premise that there's no difference between setting headers and setting body text.

Arial is terrific for body text, because at small font sizes the modifications separating it from Helvetica are basically impossible to even render. Since it has all the hinting to ensure it displays nicely at small sizes, it's a best-of-both-worlds scenario. And Helvetica looks pretty good at large font-sizes, even on Windows systems (admittedly less smooth, but the readability concern goes away). There's no reason to stop using these, just play them to their strengths.

Likewise, Verdana and Georgia are terrible for headers. Not for any technical reason like hinting, but simply because they were designed to be extremely legible on computer monitors at small font sizes, at the expense of actually looking good when blown up. Hence Verdanagate: http://en.wikipedia.org/wiki/IKEA#Verdana_typeface