yes its finger attack and wrist attack.The English concertina,is a great instrument for playing just chords as is the Anglo.ITS CALLED DEVELOPING TECHNIQUE, If more concertina players played or listened to this music, it would probably happen and evolve.
Betsy your talking about duncan turner [stage name steve turner].
personally I find different songs, are suited by differnt kind of accompanying instruments.my song accompaniment tutor gives aggod idea of some of the songs that are suitedby concertina ,but you have to be able to read music.Dick Miles