I'm pulling that poll I posted about the #cortado vs #americano. Because quite embarrassingly, I got the cortado drink wrong, at least as to how it's served in the US and Canada.
It is usually a ratio of 1:1 espresso and ***steamed milk*** not hot water.
I've been to local cafes that do it as 1:1 water and espresso, and had it that way in Europe. In Australia it's apparently a short black.
So... oops.

