12:01 PM >> Two Sides of the Same Coin

5 minutes, 15 minutes, what's the difference?

HEADS
It is a mental difference.

15 minutes >> That is a long time, I mean it's half an episode of The Simpsons.
5 minutes >> That is super-quick, hardly longer than the opening credits of The Simpsons

15 minutes late to work == trouble
5 minutes late to work == not even noticed

Something that takes 5 minutes or less you can do on a whim.
If it's 15 minutes, you have to plan it into your day.

TAILS
I see them as being practically egual.
Sometimes I have shits that are 5 min, sometimes 15 and I don't even notice the difference.