Ian C,there is plenty of evidence amongst the opinions of the Irish People,handed down from one generation to another.It would be advisable to keep your opinions to yourself if you ever visit Ireland.
jack C,it is perfectly easy for a good singer ,to sing ornamentation,,in fact some of the tunes that I play, I cant help singing/Diddling in the same way[including ornaments],but then I dont over ornament when I play. I,like you say concentrate foremost on a good dance lilt.Dick Miles