Having lived in Boston, SF, Seattle, and now NYC (and having visited LA on numerous occasions), not at all surprised to see this. Even considering the population differences, NYC wins by a large margin if the goal is 'best public transportation', and by proxy 'best metro area for commuters'. NYC has (by far) the best public transportation system in the US. Nothing even comes close, though obviously MTA is not perfect…
I had a friend who was born and raised in the New York City area. I couldn't tell you what borough specifically. He was used to that insane commute. Wake up early, ride the train(s) for 90 minutes, work, ride them for 90 minutes home, have dinner, and go to bed. This is what he considered normal. When he moved to a city that doesn't have a broken transportation system and his daily commute time went from 3 hours to 30 mintues he said "Wow. So this is what it's like to be alive! I didn't realize this is what being an actual person was like".
http://www.nydailynews.com/new-york/new-yorkers-havelongest-...