sugwash ,yes I agree ,but when practising at home,a metronome can be a useful tool,in eliminating problems such as speeding up between the a music and the turn.
this knid of speeding up does not help dancers .it is also common among session players who have not played for dancing or practised with a metronome.
the ultimate parody was Peter Sellers ceili band playing [tell her I am],and ending up exploding .