My mother would tell you otherwise. My worlds were all in that big bag of bricks. You could collaboratively build machines and landscapes, then tell stories within that transient place. And once you got into "Technics" sets, the mechanical components were actually quite sophisticated. I've put in thousands of hours into those little plastic bricks.
Ok, but the very fact that you write «mother» suggests a certain "demographics", while the title of the actual article is 'Looking for Flynn effects in a recent online U.S. /adult/ sample: Examining shifts within the SAPA Project'.
Minecraft's full release date? November 2011. Just sayin'