Plain and simple(edit)
At one point during the presentation, he demonstrated how he checked that the typography still held the weight on the National Gazette front page redesign (pg. 42).
Since they're fun nuggets of code, I've written a simple bookmarklet that strips colour, images and background decoration from the page, leaving you just the content and typography.
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Drag and drop the 'plainify' link to your bookmark bar to install.