I have been narcoleptic since high school. I was only diagnosed with it 8 years ago (I am ~40), so I actually lived with it for around ~15 years undiagnosed. In that time, I graduated high school, college, and went into a career.
So, with the preliminaries out of the way, and in a effort to contribute to the AMA comm:
It probably is, and fixing my poor sleep hygiene would get me better sleep, but I am sleeping enough and medicated enough to get by. However, as it becomes winter where I am, I have to be more careful. I definitely have to get 8+ hours in bed, though.