Other than performing the test on a variety of people and averaging the data (which would be too ponderous, I'd have to find a bunch of people my size, for one), there wasn't much else I could do to control for variables during the dry tests. Outside conditions and my activity level were equal. Close enough for these purposes.
Wool has many virtues, but for reasons detailed in the article is simply outclassed in realm of midlayers. Once you get into fabrics beyond the 200 g/meter class the warmth/weight ratio of wool is not good, and the moisture retention goes well beyond the point of desirable moisture buffering towards being dangerous. You can make a good case for wool as a soft shell-ish outer layer if it's the old, lanolin-included type. My Pendleton plaid shirt has a pretty good DWR, a bit of wind resistance, is tough, quiet, and resists sparks around the campfire. I used it over a wool t and the Cap 4 hoody while hunting this fall.
Various types of windshirts can be mixed and matches with these midlayers to suit different conditions. In spring and fall around here we get lots of blustery days around freezing with mixed precip. The Cap 4 and hard shell windshirt (Quantum, Houdini, etc) is for me a great combo there. The shell may wet out, but body heat keeps the moisture from going further. The same combo may, oddly enough, be too warm at colder temperatures if the stress of liquid precip is removed from the equation. Cap 4 and Boreas works well for aerobic effort in pretty serious cold without serious wind, conditions where a hard shell windshirt might trap mositure inside.