As a person who had the misfortune of taking Public transport from La Guardia to Manhattan, I would not label entire NYC "world-class" unless I get to append it with "mess".
Uh, thanks for the downvotes? My point is that there is no express public transit service from LaGuardia to Manhattan; there's a express private service, and most people know about it. If you look on the Internet it's pretty visible.
So NY would be a better city if they started an express bus service that competes with the existing, popular private bus service? Either way, I take the bus.