give it a little time sitting in open air and the purest water you can conjure will pick up plenty of conductive substances to be a decent conducter, unless you have completely pure water in a closed clean enviroment without any contaminants then you are going to introduce conductive substances into that water...
why in the world are you arguing about the conductivity of water anyways
heck I dont even understand the reason for this argument, how many systems are grounded to the body? 99% or is it 99.8% in those cases it works just fine, and it is fairly simple to do, so forgive me but why argue over the fact.