I wouldn't put Glen Breton in the "low-end" whisky category . . . though there are a few single malts that could possibly be so categorized such as
SHEEP DIP SINGLE MALT SCOTCH WHISKY, and even that dubiously named libation is a reasonable malt if there isn't something better around. I would definitely rate Glen Breton well above Sheep Dip, but it may be more of a novelty (being Canadian made and good) than an actual contender in any serious competition with other mainstream Scotch whiskys. However, the Scotch whisky industry would definitely try any possible peemptive action to stop inroads into their market. Personally, I still prefer my whisky Scottish and can generally find it more reasonably priced than the Cape Breton interloper. My usual is
GLENMORANGIE SINGLE MALT for everyday (well, not 'every' day) drinking and on occasion one of their specialty wood finished varieties. I have heard that Glen Breton may be finishing some of theirs in specialty barrels (ice wine?) so I may try that.