I think I wasn't clear enough on what I meant. Open Sans itself is a nice font, I have nothing against it. As a web font it might get rendered improperly, but

I think I wasn't clear enough on what I meant. Open Sans itself is a nice font, I have nothing against it. As a web font it might get rendered improperly, but that is an issue with the browser and the platform. What I was talking about -- unlike, say, Arial, Open Sans also has a light weight (font-weight: 300) variant. That is now popular with large headings BUT I do not find it at all readable as body text (in Open Sans or most other fonts). Wordpress.com is a good example, as they do NOT make this mistake.