Hmm, I've received different information than yourself. There were more printed books, but that doesn't mean there was significantly less learning and literacy that came before, although a different proportion of the population was literate. And lack of general literacy does not necessarily entail lack of learning or understanding. For example, much of the iconography comes from that era, and the lay person was taught through imagery and liturgy, not necessarily to their detriment. As far as I know, the university system we know today came into being mostly within the context of Catholic Church's clericalism and much of the great philosophical synthesis came about during that time, especially with Thomas Aquinas.

At any rate, we are obviously referring to different things by the term 'enlightenment', definitely different historical epochs.