So is there a genetic superiority of Slavs in this field(at least inside white race)?
As a young fella in the early 80's, I was the lynchpin of an 8 child b-boy crew, the "Rock Steady Crew" (yes, we plagiarised heavily, and adopted their names, except for the girl). Our crew was made up of me and 7 other kids who were all of Lebanese and Maltese descent, whereas I was Slavic.
When we 'battled' other crews, and were up against fierce opposition, my mates upped the ante by bouncing me in - my boogaloo shrimp, robot and electric shock usually sealed the deal.
Sadly, I've put away the shell back adidas runners, the RUN-DMC custom ripped muscle shirt and polyester leisure pants, but for 2 summers, in '84 and '85, I ruled Woollongong's underground B-Boy scene ;-)