I drove for Stagecoach, here in the UK, and virtually all of our fleet of buses and coaches were automatic. The only ones with manual transmission were old hacks. Small buses that had come into the fleet from acquisitions of other companies. Everything from the small local buses, through the coaches, to the double deckers, which are used a great deal here.
I loved driving them, and in city traffic there is nothing to beat an automatic transmission, especially when there is nothing further from your mind than the fuel costs!