There is a point of view that NYC's, and much of Europe's too, idea of Salon is rather more flamboyant than in Buenos Aires, largely because of the influence of show tango and Nuevo teaching for social dancing. That's a reasonable observation, but isn't necessarily the most appropriate way to dance on a social floor. In the competitions they certainly are not being asked to dance in typical milonga conditions. However JanTango has previously commented that the older traditional milonguero pairings don't now get a look in indicates perhaps that the more visual styles are in the ascendancy. Your videos appear to confirm that. I'm afraid I regard their bravado as misplaced. I might have said I feared for the consequential damage to tango but this change to a more visual larger style is a result of teaching and the damage is already done. In the final analysis, in a competition they are all performing.