OK here's the first "test" report.
I walked a 4+ mile trail in Nags Head Woods I've walked a few hundred times ( options here are slim but if you have to live with one trail this is a good one )
The temp starting out was 70 dropping to 66 at the fimish ( right at sunset ). The humidity was @ 60% which is low for this locale.
Walked almost exactly 60 minutes ( I've done this trail in less than 55 but for a 5'8" guy with a 28" inseam 55 minutes is as fast as I can walk without jogging) Average heart rate 126 and burned @645 calories.
I was wearing this year's Salomon XA Pro 3-D trail runners w/out gtx. and cotton ankle height light athletic crew socks to try and collect moisture.
The socks weighed 22 grams dry. After the walk they measured 26 grams; but the sock on the gaitered right leg first tipped the scale at 27 before settling at 26 and seemed to take a second longer to resolve it's weight at 26 when re-measuring. I think it had more moisture
By the end of the walk my right foot felt more damp and felt like it was getting borderline on being blister rubbing damp.
Still the difference was negligible and would surely be much less with the synthetic running /liner socks I normally wear. The right foot and lower leg didn't feel noticeably warmer.
One surprise was that the toe area suffered some slight damage/ abrasion right on top of the toe which later when sprayed with the hose leaked immediately.
The scrunchies showed no real apparent wear and with backups seem like they ought to survive most trips of a week or less even if the gaiters are worn often.
The tops were pulled down a little I think by the action of the pants I was wearing. This didn't reach that hard to define annoyance/issue level and may be really negligible with shorts but I'm going to look at ways to tighten up the tops.
I think a duct tape toe cap about 1.5 to 2 inches wide may be in order. The seams also need to be sealed as the holes left by the stitching are pretty big.
Overall I think these gaiters will do the trick on stopping the problem of wetting out the toe area and getting moisture wicked back over the foot/sock from dew and wet vegetation repeatedly contacting the mesh tops of trail runners. I also suspect they will keep one dry in all but the hardest most persistent rainfall.
Stay tuned!