Andrew, most of your comments mirror my own, so I guess most of your thoughts are also misinformation?
One thing that you're right about is that the baffles do contribute--even significantly--to the warmth of the pad. However, your statement "the fact that the baffles are reflective is a minor enhancement" is patently incorrect, because the baffles are not reflective. For those curious, the radiant heat barrier of the NeoAir only accounts for approximately 25% of the R-value of the pad. Cascade tested the pad as just the shell w/the baffles, no radiant barrier, and found an R close to 2. I was quite surprised to learn that. My personal feeling is that the baffles do a lousy job controlling convective current transversely. Apparently that is some concern, & although entering the realm of "hard to tell," a Cascade employee has concurred w/my previously expressed thoughts that you do have some extra heat loss thru the sides... but which can be mitigated by use of a tent or a narrower pad with a sleeping bag that overhangs the edges of the pad to keep the heat in. My problems occurred w/a wide pad and a narrow bag under a tarp.
Please note that your comment "Yes, they keep you warmer when formed into a bag because they then trap air. They are also a vapour barrier so stop evaporative heat loss." echos exactly some of my comments.
On "This is not possible unless the blanket was formed into a multilayer corrugated blanket like a Blizzard Pack, in which case it is again trapping air," re: the R-value, apparently some testing has found that it is possible. If I recall correctly, however, those tests were done in a different context, that of building materials & construction. If I can find the references, as I stated originally, I will post them. I have owned and used a blizzard bag (actually MPI) and it is quite remarkable. But it is a different matter.
"Only if you've already reduced the other sources of heat loss to a minimum," Um... Yeahhhh. That falls into the category of "Duh."
I do appreciate folks comments about the baffles, because it made me do some more research and I found that they do contribute more significantly to the insulative value of the pad than I originally thought. Ie, I was wrong about the radiant barrier being the primary warmth. I've had one the pads cut apart in my hands, investigating it closely, and could not discern any practical R-value in the baffling. Just goes to show ya!