Yeah, I agree with Oliver (in the comments).
For example, in the table under "Data-Ink Ratio", alternating white-gray backgrounds would make it more readable without adding too much visual distraction, wouldn't they?
But thanks for the article. Sometimes we all get going on autopilot and forget the little things that can really make our web pages or user friendly. So, it's good to see it explained, and with examples too no less.