One point that I think Frank Hamilton was touching on is that the Irish sytles themselves differ. I am no expert on these matters but as far as I understand it, I Donnegal style player is likely to play a lot faster and "straighter" than a Clare sytyle player.

Also, what do we mean by fast? Not the best example but I had this to hand. I have placed a copy of my favourite reel, the Silver Spire on my web space and have timed it at 220. Is this too fast or too slow? I know that when I am in practice (I've not played much this year) and play the tune at 200 on the banjo, it feels too slow to me.

BTW, the worst thing that happens in sessions IMO, is not a tune being played at a fast but steady tempo but the "races" which unfortunately seem to be all to common - the tune just gets faster and faster with no control.

Jon