I've had a little experimentation with the shirt, but not so much backpacking. I do most of my backpacking in fall, winter, and spring since i live in the humid, hot southeast and i run warm. I bought this shirt late spring/early summer. What i have worn it while doing is during jogging.
I found it to be pretty good at moving the moisture, but like you, not as magical as those video demonstrations have shown.
I plan to test it more as it cools down, especially in relation to combining it with a windshirt in rain. It sounds like the new Houdini would be better for this than my slightly older version unfortunately.
How have you washed it so far? That might (actually, more like likely will) affect it's properties some. I suspect it would be best washed in a mild, soap based cleanser rather than a detergent, definitely without any fabric softeners, and then rinsed very well. In a sense, it would probably be best to treat it like a WPB, DWR, or super wicking fabric.
Unfortunately, the company doesn't really say "how" this shirt is supposed to work. I know a lot of their stuff works on chemical finishes or alterations of the fibers at micro levels, but there doesn't seem to be any information on Dry Inside. If it's a chemical or polymer type coating, then i'm a bit wary of the "for the life of the garment" claims.
Anyways, so far i think the Cioch liner is better at the pumping effect, but with these things it's really hard to say, how much, how little, in any objective or concrete way.
But when i get some cold and rainy weather, i plan to test both in comparison a lot more extensively using a windshirt as a shell. I'm not sure what i'm going to do about a "hood" with the Nano tex shirt since it has none. I've thought about buying a t-shirt and cutting it up and sewing on a hood to my long sleeve shirt.