I mean, sure, they could have said "Imagine a social news site where the key value was in the comments and the comments were only accessible if you hit a target which was 62 pixels wide and 10 pixels tall".
People would say "Eh, like anyone would do that. That would be a clear error."
I bet I just sent a bunch of people to the homepage with a ruler, right? Good.
Now would you have rather heard about that issue, or not heard about that issue? Personally, I'm in favor of being a cautiously humble absolute dictator when doing web design. Absolute dictator because ultimately I have the only say that matters, cautiously humble because if the data says that my cart is costing me $30,000 I will follow the data. (I wish Smashing Magazine would give me free usability advice.)