Just a quick observation from across the pond here. My local Hobby Lobby (a chain crafts/sewing/home decor store) has more Airfix kits on the shelves than I have ever seen in one place in the flesh. Apparently the Airfix folks are indeed pushing into the US market. Hobby Lobby offers a 40% discount which means my P51 and P40 were both bought for well under $20. That puts Airfix kits in the hands of the masses.
Both of the kits are well molded, and have first class packaging and instructions. Just from watching the stock these kits are in fact moving. Cheers to Airfix for building a foundation!
(I need also to point out that prior to these kits hitting our shelves Airfix kits were not widely available in our admittedly meager collection of hobby shops. The several 1/48 and 1/72 kits plus the 1/76 battle diorama sets that are no doubt compelling to those used to Revell US stock only.)