In reply to andrewmcleod:
To be fair to the UKC review team, most brands don't advertise the weight of down that they put in their jackets and this info can be awkward to track down. Rab are one of the few who are open about this. There's a difference between folk buying a pub/font jacket, for whom "medium warm" will probably do, and those that are taking them to extremes, who really do want to know about that extra 10g down in the hood. I suspect a lot of brands write up their garment specs to impress the former category of wearer.
(I've been known to do a bit of gear reviewing myself elsewhere, and getting product that meets your brief, then all the relevent information about it out of the PR agent, then testing it in a dry sunny autumn when its a winter garment- all tricky esp in a big comparative test like this.)