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Variable frame rates is a different issue. For example, reacting within 100ms feels instant, whereas an animation running at 10fps (one frame every 100ms) looks awful.

With interaction response, the faster the better.

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Not true. I am talking specifically about interaction response, not the rate of animation display. It is about your brain learning responses to its actions so that it can better plan its actions. That cannot happen when the responses are semi-randomized.

Seriously, there are tons of studies on this. I am not making it up.

Then provide some citations, instead of vague appeals to authority?

He already did, human factors and the need for consistent performance, even if that means that the lack of speed in performance is consistently bad is in it's own way an advantage. The fact that we now have wildly inconsistent performance depending on the pages we're viewing is bad in terms of human factors. If you want precise scientific references try google but these are basic known facts.

Overall I'm not sure how I feel about this topic myself but I do understand jblow's point and somewhat agree with his rant.

I'm not sure why you say "He already did" when I suggested providing citations. I don't see any.

Isn't this rather intuitive?

Lots of things are both intuitive and wrong.

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