I have no issue at all with the points made on positions/lead/follow. Soley for UKD's sake, however, as a newer dancer, it should be noted that chest-to-chest lead was not originally intended to mean an actual mashing of these body parts throughout the dance. It simply meant center. At his stage of learning, it could be very helpful.
I don't know where you get that from as I suspect any intention in the
evolution of tango was entirely unintentional. It is true it shouldn't
be a clamp but that is entirely my opinion and some of my partners
I know from experience have experienced my clamping which itself
was entirely unintentional. You have to learn to be toned and relaxed.
Neither do I seek to get into vocabularies, the translations of words, and/or the differences in meanings of these terms as they transcend cultures. As a linguist, we can do that later. What I meant was that there is a minute rotation of the feet in most cases during the molinete. It has been/is seen danced flat-footedly, that is to say, by simply placing the foot, but it is not as comfortable. The lady is dancing around the man. To dance a circle without some sort of rotation of the feet would result in an awkward positioning of the legs.
Leaving aside that my lack of swivel point was about back crossing ochos
not molinettes, Christine Denniston talks about the foot always pointing
at the man's heart in the molinette. In that case the weight bearing foot
must rotate naturally as the foot is in place while the couple are turning.
2- As UDK mentioned, and I am ecstatic to hear it, good ballroom is not arm controlled either. The rigidity, as you put it, of the topline is for aesthetics and movement, and its only role in leading/following is the accommodation of said movement. When I learned, we had to dance with 33rpm records held between us by our bodies, and without an arm/hand hold. And, yes, we had to pay for every one that dropped and broke.
UKD keeps dragging us down a path of pedantic technical comparison with ballroom.
Ballroom is written down, standardised and codified, much of tango is
evolution and personal experience.
I'm not going to argue the the ideal ballroom hold - my ballroom is from
social learning and dancing not a professional or teaching viewpoint. You
are right about the arms but they are there, ballroom people do talk about
maintaining a frame and the top line, and the frame does get used. To
"amplify" the lead as UKD puts it about his tango.
It is odd that UKD is insisting that ballroom doesn't use the arms,
when in comparison to tango it has a much more rigid arm frame,
and yet when he comes to tango, which is usually taught without
an arm frame and is lead from the centre, he is insisting he uses his arms.
From his writing he should be an expert in leading from the body whereas
coming from ballroom I found I had much to learn for successful tango.
We can only write from our own experience.