I see no such thing, nor a difference. On Chrome OSX Version 23.0.1271.101
Did you check the comparisons in the article? If they truly don't look different, I'd love to see a screenshot of the article so I can check it out and dig into it. Thanks!
he may be on a retina mac, i see no difference on chrome either
Look at the Londrina. The right one is a little bit bolder.
Even so, I don't think I would ever notice something like that if it wasn't for the side-by-side comparison.
Nah, I just opened it in Gimp, moved the right one on top of the left and toggled it visible/invisible. It's identical (at least from the screenshot posted by the GP.