Thanks for the information Lox.

It seems to me that some of the problem concerning speed at sessions could be due to the fact that some instruments are inherently or potentially faster than others. I mean no offence to anyone here, but if one were to 'race', say, a whistle, a fiddle and a concertina, the whistle would win every time. I'm sorry to put it in such an irreverent way and I hope it illustrates my point adequately.