A 12-year-old rapping sounds like a 12-year-old rapping, even when it's a 12-year-old Kanye West who's doing the rapping.
The proof of this comes in what appears to be a home video of a middle school-aged 'Ye, from 1990, rapping for the camera at a house party or family gathering of sorts. "I’m def and I'm fresh and I’m on the rec/ Nothin' less could come from West!" he raps.
From the living room to The Life of Pablo.