Interesting. The water should open up the flavours and improve it but not so drastically as to change it completely. Not in a way comparable to beer, anyway.

How much water did you add? When I said a splash, I actually meant that. Just a teaspoon or so. You can fill a tumbler, I guess; I believe that's quite popular in Japan (as is ice) but personally, I think it dilutes the whisky to the point of being pointless.