CGP Grey has a great video examining different boarding methods and why some are slower or faster than others: https://www.youtube.com/watch?v=oAHbLRjF0vo Also noting that the way we deplane (front to back) is the slowest method, heh.
Great video. This is one of those phenomena, like how to fix traffic jams, that everyone has an opinion on because of firsthand experience, but few people know about the actual research on. Despite there being known fast methods, I think 2 things stand in the way of implementing them: 1) Business and 1st class make a lot of money for airlines. Not letting them board first (although personally I've always wondered why…
When I was fat, I paid extra for first class tickets so that I wouldn't be the slob jerk who overflowed into my neighbor's coach class seat. Because of that, I had a lot of coach-mindset first-class seats.
Boarding first in first class gives you an opportunity to get some work done, to relax a bit before the plane takes off, and almost always you get to have a drink and a snack before the plane leaves the ground. It gives you a chance to put your head on straight for the next leg of the journey, or catch up on stuff before the ascent.
If you're a busy person (as I was back then), boarding first really makes a difference.