Duolingo’s marketing is not the issue - the issue is the majority have unrealistic expectations regarding the effort and time involved, get frustrated and then

Duolingo’s marketing is not the issue - the issue is the majority have unrealistic expectations regarding the effort and time involved, get frustrated and then give up. Yet if DL maintains that "Fifteen minutes a day can teach you a language" (in addition to being "The world's best way to learn a language") -- then it would seem that its marketing quite definitely is at fault. Being as it is (in part) from ad copy like this where these misconceptions originate.