This is the correct information.
The hotels in the Downtown Disney Resort Area have its own bus system. The 4 hotels on the east side of Hotel Plaza Bouleward share buses, the same with the 3 hotels on the west side. There are buses going to MK, HS, EP, AK, TL and BB. The buses to the theme park leaves every half hour, and there is return times from each park every half hour until 90 minutes after closing time of the specific park. The buses to the water parks usually leaves twice a day, with return once in the afternoon. Usually you have to share bus with people going to at least one other park. For MK the bus stops at TTC, so you will need to take the Monorail or the Ferry. For the other parks, they will stop very close to the entrance.
I found the system easy to use and it never took long going to or returning from the parks. For less madness at TCC, take the ferry, more standing room and generally higher capacity.