I think I'll probably have to write to the Jamesons' factory in Dublin then because they claim bourbon is only distilled once.
The tour there used to give every visitor a thimble full of bourbon, Scotch and Irish whiskey so you could realise the difference. Apparently they only now do it for a...
American whisky is generally distilled once, Scotch twice and Irish three times.
Personally I prefer Irish as it tends to be a little smoother. And yes, no fecking ice!