Most resorts have buses about every 20 minutes, but, due to the number of stops, and loading and unloading at each stop, gaps can develop and wait times can increase. This is hard to predict. If someone with a
scooter gets on and they aren't very good at using it, you can assume it will add 2 minutes.
One problem that isn't apparent is that many resorts, perhaps most, have to make
multiple stops. Multiple stops can significantly increase transit time, to or from your resort and make it less predictable.
* At Animal Kingdom, there are only 2 stops. Kidani first, and then Jambo. I personally think Disney recognizes this resort is perceived to be farther out, and they try harder. I know that a slightly higher percentage of the Membership Dues at AKV goes to transportation than at other resorts.
*At Poly the buses also go and stop at the Grand Floridian.
*BWV, Beach Club, Swan and Dolphin often share buses, with the buses typically making at least 3 stops and sometimes more.
*SSR and OKW have multiple stops (at least 5 or 6) INTERNALLY, as the buses meander around the property.
The monorail is typically slow and inefficient. The Resort Monorail, that runs Clockwise around the 7 seas lagoon takes about 25 minutes to make the loop. That is longer than you might expect, considering how close you are to MK. Transportation Center Monorail runs Counterclockwise, but it only stops at MK and TTC. To get to Epcot from BLT, Poly and GF, you need to either take the resort monorail around the loop, or walk to TTC from Poly. Then you wait a few minutes for the Epcot Monorail to arrive and load, then take another 15 minutes or so to Epcot. So, to get to Epcot from GF could require 40 to 45 minutes or so. MUCH slower than the buses from most resorts. And even the buses from AKL make it to EVERY PARK significantly faster than that. Once you are loaded onto the bus (from any resort) and it is moving away from the resort, you are 10 to 15 minutes from Everywhere.
The Friendship Boats/Ferries/Motor Launches typically take about 20 to 25 minutes from HS to Epcot, plus, sometimes, extra loading and unloading time.
The Gondolas will probably be a SUPERIOR way to travel to Epcot and HS, but, of the DVC Resorts, ONLY Riviera is in position to take advantage of it, until Disney expands the lines and extends them to other resorts.