My understanding:
it is not a "native' style whiskey to to the keepers of tradition in Britain, so it is automatically suspect.
Add to that the stigma that came with the 1930's prohibition in the USA, since bootlegged Canadian Rye was all the illegal bars of that long ago day could serve, does't leave Canadian Rye with many boosters in the USA, the largest market on earth.
I sometimes drink Canadian Rye, and like it, but think Scotch generally has more interesting flavours. I don't see the appeal of Bourbon at all, but that's probably from growing up in a different culture than the corn belt of the USA.
