I am thinking about this style when I think about USA amateur boxing. Not that I am familiar with it, but here on TV there is rarelly boxing shows or talks about boxing, but they often come to Maywheater vs Todorov loss and the moving and fluid blocking of the American style and how it mixes up with block + attack. Something Maywheater was very good at was blocking a hand and countering from the same side, and his defense. If you watch these guys, they are very mobile and dancing with their upperbody and fluid on transitioning between defence and attack. Which I connect personally with USA boxing. We, as far as I am awared, are not tough in this way. Actually if you watch Maywheater vs Todorov you will notice the difference between USA boxing and Easter Block boxing. Serafim Todorov is measuring him, staying tall on his stance landing straights mostly and being very effective in the distance, knowing the distance fighting and using side steps. While Maywheater is bouncy, very fluid, little short stance, countering quickly, getting in fluidly. Funny I just heard the Bulgarian coach shouting at Todorov "Stay calm, fucking stay calm, do not engage in a fight". By the end of 1st round.