The fluff in Freeman's article (Journal of Irreproducible Results, I think) is the same cheerful fluff students were subjected to in the non-honors physics class at my high school in the 1980s, where the point of using physics predictively went out the window (leaving only untestable descriptive math, which isn't a waste of time, but could be applied to something testable), and with the same fundamental failure of simply not caring whether there might be an underlying mechanism related to the impression of remembered time versus the subjective speed of time currently.

A change in behavior can also have a huge impact on how fast current time is flowing. A simple hypothesis that the subjective rate of time passing is related to the intervals between encounters with the unfamiliar easily leads to a more fruitful set of thought experiments than Freeman's weak exercise. And potentially one that could be rephrased in biological terms.

I've noticed that when I take trips to elsewhere in the world, the more different the place, the more time dilates, both while I'm there and in memory afterwards. Doing only the familiar is the recipe to time slipping by, unmarked and unnoticed, like driving to work and realizing upon arrival that one has no memory of the trip.

So the question is: What should you do to extend your subjective time?