Single Malts vs Blends

[Mike B]

I'm going to post this on two forums here at whiskey.com to see what kind of responses I get. I'm not a big scotch drinker but I do like it, I've had both single malts (occasionally a sip of expensive stuff from my friend's glass who smokes cigars with me) and occasionally cheaper single malts that I might have, and also some blended stuff (not expensive). Is there REALLY that much difference betwen single malts and the blends? How about a comparison between good single malts and an expensive blend? Do the expensive blends hold their own in a comparison? In dog breeding, most say that the hybrids are preferable to the pure lines, usually smarter and longer-lived, mind you scotch isn't dogs though.