My bathroom sink drain was way slower than I thought it should be

I mean, I was just messing around on YouTube and found this video from a plumber in Cincinnati. He said a standard bathroom sink drain should empty a gallon in under 30 seconds, so I timed mine and it took almost two minutes. I pulled the stopper and the gunk was insane, like a little hair monster. Has anyone else actually timed their drains to see if they're running slow?