From my personal experience, South Africans are the ones who are most conscious. But that makes sense given their history with apartheid. I've met a few overseas who rocked with the American brothers heavy. Also, the sistas were open to being hollared at and were the one group of non American black women who rolled with American sisters heavy (along with some Caribbean sisters if they spent time in America, if they didnt' not as much)
Next, maybe Zimbabweans, also given their history as well as a few Namibians. No offense but Kenyans were some big time bedwenches. Nigerians as well. And the dudes were just tryna holla at anyone with tangibles, black, white whatever, but their choice was white.
Caribbeans had the most down I'd say. Case in point, Reggae back in the day talked about Africa, black unity and Bob Marley had a song dedicated to the struggle of FBAs (Buffalo Soldier). Still coons are way over-represented unfortunately.
Not many Nigerians think like this sista. Guarantee you her community gonna tell her to slow her roll when it comes to black Americans.
Overall, in Africa, when you find one is on code, they are on code like a motha fugga. I've seen it first hand.
On a sidenote about South Africans. I noticed one thing about them socially. I've been in bars where they are showing a rugby match with the South African national team on tv. Hella South Africans in there but the white ones are on one side and the black ones are on the other. Also, white South Africans I've met, the few act really cool with black Americans. They are some of the nicest. Obviously I don't trust them but gotta keep it buck that they are generally very friendly to black Americans. And I also noticed American white boys are buddy buddy with black South Africans way more than black Americans. My guess? American blacks don't have history with the Afrikaaners so they are friendly and black American culture is popular and they don't get a chance to meet many of us and the black South Africans don't have bad history with the American white boys and the American white boys can say they have been friends with 'blacks'.