I think that was in print, but don't remember when/where, however, the statement is totally meaningless. To people who are ignorant and naive, a "college education" is something special. When I transferred to a new congregation some years ago and delivered my first part in that congregation, an older sister said "you can tell he's been to college". I was thinking how stupid and ignorant that was. I had been to college for a number of years, but that had absolutely nothing to do with my parts (content or delivery).
There are vast differences in college educations. Those differences depend on courses of study, difficulty, etc. I know people who graduated from college who don't know the difference between an adverb and an adjective, who can't manipulate simple fractions, etc. I know people who have zero college who are brilliant and knowledgeable.
So, reading the Watchtower and Awake is like having a college education, they say? Try getting into a professional school (JD, MD, DVM, DDS, etc) by putting on your application that you didn't go to college but you read the Watchtower and Awake for a few years. You can even add that you didn't miss a single issue and read every word. See how far you get.