No. I'm 30 and still read mostly fiction. Heck I still mostly read YA because I prefer a faster paced plot and somehow teens just feel more relatable (maybe because my love life is once again a mess and I'm still not comfortable at being an adult who has to job and be responsible and stuff). If I read non-fiction it's a very rare exception - something like Tom Felton's autobiography. I use reading as an escape from reality and audiobooks to make boring stuff like commutes and chores more enjoyable. Not to say that non fiction cannot be entertaining - it's just not my cup of tea.