The conclusion I have come to regarding visiting Argentinian teachers is that their teaching skills compared to European teachers comes a very poor second. I think this has a lot to do with their language skills and they have needed to find methods to teach to get around that especially in group classes. I think this has led to the evolution of teaching though sequences and the sequence then becomiong the focal point and not the technique that at one time it was supposed to bring out. For instance, I went to a milonga class during the week with a resident Argentian teacher. It was clear to me he had relevant matereial to teach, he could easily dance all this material, he knew the best music to play to bring out the points he wanted when teaching the material but other than to show the steps he no idea how to break things down and explain what was required and compared to most Argentinian teachers his language skills are good. Why should one have anything to do with the other? The other thing I have noticed is as your dancing improves and you get more confident you then attend more popular Milongas, many of which are outside your own area. Almost by definition these Milongas are busy and have crowded dance floors. People that may have been taught using OE and/or big movement very quickly have to adjust to dance in these places. Therefore what I am noticing, very much like Zoops has said above is that people may not start off in CE but they end up there.