Fresh off the press... Chrome will make text visible after 3s (i.e. slow font download), and rerender once it's ready: http://bit.ly/1luUIst - this is the same behavior as Firefox. 

If you're wondering why 3s, see our stats here: http://www.igvita.com/2014/01/31/optimizing-web-font-rendering-performance/#timeouts - tl;dr: this will affect ~1.1% of font requests. And if you want to override this behavior, then good news, Font Load Events API is shipping soon as well (see above post for more info).
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