Music in la cancha

Yesterday I went to see River Plate playing against Godoy Cruz, from Mendoza. I really don't want to get into football banter, but River play really badly and need to get real to get to their deserved status. Anyway, the way how I got dragged into this game was unexpected. A friend from work phoned me when I was CD shopping in Florida "Vamos ver River", "When", I asked,. "En 1 hora!"... So, there you go, I had to get to the other side of Buenos Aires and hope the bus didn't crash.
My post, really, begins in the bus journey. The bus was full of River supporters, fully armed with drums, djambes and lots of chants. And they were singing their hearts out, while in the bus. One thing that I noticed was that throughout their chants, the drummer did exquisite changes in rhythm. Time, half-time, contra-time (transpié), back to time, pause and again... After a few weeks of classes with the Disparis I got a bit neurotic about rhythm of tracks so this was a complete revelation to me.
And it maybe explains why Argentines get tango so quickly. A lot of things that people in the UK have to really make an effort to understand (or even hear) is second nature to Argentines. A teacher of mine (not from UK) told me she didn't like to teach in the UK because she had the notion that people "didn't get it". They wanted perfect technique, fancy steps and sequences but never endured to really understand what they supposedly were dancing, the rhythm, the music, the dance beyond the need to show the rest of the people in the milonga how good one is.