The average time, using DME, from MCO to just about all of the WDW resorts, is 70 mins. I have taken the DME bus to POP about 5 times now...once we were the last of three stops (AKL, CSR, POP) and it took close to 90 mins to get to POP. But, there was an inordinant amount of luggage that had to be unloaded at the first two stops...that added time to each stop.
The other times I took the DME bus to POP, we were the first stop...so, usually got to POP within an hour, usually a bit less.