My apologies, if I want clear in my original post. It was the weak tasting drinks that made me look at the bottles and put two and two together.
Now, I have been drinking this scotch for the past thirty years and have developed a good understanding of melting ice, whiskey stones and so forth.
I would ask other people on the forum who may have an opportunity to try some drinks at the YYC lounge and confirm or deny the hypothesis. It's all in the name of science....