We are completely in agreement on this one Roger, even the color. I have bought nothing but Darn Toughs since 2008 and my experience is exactly like yours. I have bought all mine at AJ's Ski & Sports, not the cheapest, but darn good service and they are quick, even to Greenland!
I have tried their ski socks too for winter use, I thought they were thicker, but they are mainly just longer and not really worth it. The boot socks are their no. 1 in my opinion, I will try some of their thinner woolen crew socks for summer use though, during the height of summer the boot socks are a bit on the heavy side.