I'm prob not the best to ask re the AS bus round as I've only had one stay at AS Mus. As Mus is the 2nd AS resort in line so smack in the middle. I was there during last Feb President's Day Long Weekend and this most likely made the busing worse b/c of the crowds. However, more than 60% of my early a.m. waits at the As Mus resort stop were 30mins plus. I could see many buses drive past the front of the resort on the highway (view through the trees) and so clear they had stopped at AS Sports first, filled the bus, and then skipped the rest of the AS resorts including AS Music enroute directly to the parks. If you are staying at AS Sports this would be in your favour as no cycle thru the other AS resorts. There were few if any CMs at the AS Mus that weekend monitoring the wait. At POP, it is common to see at least one CM with a laptop monitoring the bus wait and contacting the depot to call for a bus if a line is waiting too long. I don't know if this was a one off and just a reflection of a busy holiday weekend. However, for the extra $10/night, its an easy choice for me to stay at POP. Just my experience. ps it won't be long before the AS resort fans find your thread here.
They will def provide a different POV. And that's good because its good to get as much info as you can. If you decide that AS Sports busing is good enough for your needs, then that extra $10/night could be put to use elsewhere in the parks.