correct Alan,... but accurate and consistent timing is also VERY important, as is the correct speed for particular solo dances, by using a metronome for practise, it is possible to have a pretty good idea of speed for such dances as Blackbird, Garden of Daisies., OR FOR SOLO SLIP JIGS , HORNPIPES ETC.
Of course nothing is as good as actually practising with the dancer.
... if the dancer indicates a little slower or faster, the player must be able to adjust.