The OLP times I checked are significantly different from those found in the Unofficial Guide.
For example, OLP's website lists the time needed to get from Fort Wilderness to the Animal Kingdom using Disney transportation as 26 minutes, including a 5-10 minute wait for transportation. The Unofficial Guide says it ranges from 23-56.
I'm not sure 26 minutes is a realistic average-case estimate. In the first place, if we assume the buses run every 20 minutes, your average wait time is 10 minutes. That leaves 16 minutes to load the bus, drive across most of WDW, and unload the bus. And that assumes you're at the first bus stop in Fort Wilderness, not one of the back loops waiting to get to the front. The last time I was in FW (December '03), it took me more than 45 minutes to get from the Beach Club to Pioneer Hall, and I drove my own car to FW.
Similarly, OLP says it takes 23 minutes (including the wait for transportation) to get from the Wilderness Lodge to MGM, while the Guide says 18-48 minutes.
As HaleyB notes (thanks!), we actually ride the bus transportation to get these times. Several of us have spent the better part of a week doing this, repeated every couple of years. Along around day three we invariably try to recall whether our medical plans cover carbon monoxide poisioning.
Hope this helps! Good luck with your trip, xraydave.
Sincerely,
Len Testa