For those of us around before the craft beer revolution (not that I was
) think about your own taste in beer. I know I was drinking Bud and feeling superior to the Lite drinkers back in the 70s and early 80s. But if someone came along and handed me a Pliney the Elder or a Heady Topper then, I probably would have made a face and spit it right out. But that's not how it happened. First, we found Bass Ale, Sierra Nevada Pale Ale, Sam Adams Boston Lager. Those beers changed our tastes gradually, prepared out palates for Anchor Steam and Harpoon IPA.
Fast forward to 2015 and it's the same thing now with our BMC friends, you wouldn't give them a pint of Russian Imperial Stout and expect them to love it. You give them a kolsch or a cream ale and bring them along slowly. If they're open minded and willing, you entice them with an Irish Red or a Nut Brown ale. And you probably shouldn't ask them if they've been living under a rock for the past thirty years.
Obviously, I agree with the author. If a beer drinker is adventurous, or at least has an open mind, their palates will change. But they might need 20 or 30 years of gradual change like those of us who were there at the beginning had. Maybe not that long, but, It'll take some time.