Not that there was necessarily any question as to the science, but it never hurts to have some field testing to either confirm or deny what we expect.
I posted this in the gear section, but I thought a link here might be salient for whomsoever might read this article. I took my Soto Microregulator OD-1R and a Monatauk Gnat out about a week ago for a little field testing in 31F/-0.5C weather at about 6000' elevation (~1825m). To eliminate some variables, I used 100% n-butane as my fuel. The boiling point of n-butane at 6000' is about 19F/-7C. In other words, I was testing in conditions where the ambient temperature was about 12 Fahrenheit degrees above the boiling point of my fuel.
I shot a video of the two stoves running side by side for a period of approximately 20 minutes. That video is posted on my blog: Advantages (?) of Regulator Valved Stoves, Part II. The video is in two parts, 1) the first 17 or so minutes (if you want to see the whole thing) and 2) the last 3 or so minutes (if you want to see how things turned out). For those not wanting to take the time for either video, my testing was entirely congruent with the article.
Adventures In Stoving