I'm going to find out myself soon, since I use a lot of EKG and I ordered a pound from an online vendor that was listed as "Kent Goldings" and under their "Imported Hops" section. So I figured it was safe to assume they were British. Then I get the bag and it states "Product of USA".
I hear they're pretty good. The best summarized description I've heard somewhere on this forum is that if EKG are a "10", then US Goldings are an "8".