They are usually so fussy about authenticity.
Anyhow, they were dancing to "La Yuma" and it just so happens that Pablo Veron and Sally Potter danced to this in "The Tango Lesson."
Here is the Maria and Derek
Now, it is somewhat unfair to compare a top of the heap dancer like Veron, and someone like Sally Potter, who certainly holds her own (although some have criticized her dancing), to a complete novice, or someone who only dabbles in AT. But there it is.
And note that what we are seeing in both these performances are just that -performances. You would see little to none of this in most milongas in Buenos Aires where the dance is still alive.
I think it was last year that Derek put together a pretty good AT routine, this one, not. He's using too much ballroom. One characteristic of AT is that there is very little movment, such as shaking your parnter. We could get into the actual problems with Maria's techinique, but...
Just heard their comments, and notice that there is absolutely nothing about technique. How can they judge this dance year after year without learning anything about it?