Controversial? Really? What's written there is basically what's required for interactive speed. What's described here is basically what's required for interaction to feel instantaneous. Why should we settle for anything but immediacy?

Sure, with all those laggy applications we have right now, we tend to become desensitised. That's not an excuse, though.

Also note that in some cases, we're not even close to acceptable latency. Finger tracking on touch screens for instance, require a one millisecond response time to feel perfect. Otherwise the objects we drag will lag behind our fingers.