Well I've never had a DAM - but I've used a BA aircore for three winter seasons now - and it's as warm/warmer than anything else I've used. I have *definately* used it, bare, below 30, heck 15 is probably accurate. I've slept comfortably on it and nothing else in -10 centigrade or thereabouts. I *have* slept on it down to -28C - but that was with it sandwitched with a blue foam on top and another on the bottom.

Jim said he had a section of Zrester under it - which will affect temperature as well.