A little more data mining. Length is 2648 meters which is 8688 feet or 1.65 miles. Time is takes is 8.87 minutes total time. Speed is 14.5 mile/hr, so actual transit time is 7.07 minutes, with the remaining 1.8 minutes for load/unload. This tells us it spends roughly 54 seconds in each of the stations.
Assuming a similar speed, the distance from DHS to CBR is about 0.5 miles, so the trip time from DHS to CBR is 1.8 minutes for load/unload and 2 minutes for transit. or 3.8 minutes from load to unload. Similar distance from Pop to CBR - roughly 4 minutes.
CBR to IG is about 8,000 feet or just over 1.5 miles, or 6.2 minutes transit. If you assume the Riviera "stop" is similar to the start/end stop (0.9 minutes), that's 2.7 plus 6.2, or 8.9 minutes total transit.
So assuming only transit time (this is from the second you board to the second you offload) these are estimated times with the above assumptions:
IG -> DHS 12.7 minutes
CBR -> IG 8.9 minutes
CBR -> DHS 3.8 minutes
Pop -> CBR 4 minutes
Pop -> Epcot 12.9 minutes
Pop -> DHS 7.8 minutes
Riviera -> IG 6.5 minutes
Riviera -> DHS 6.2 minutes
And of course the reverse are true.
Interestingly that Riviera gets the most even distribution of transit times - though again it doesn't include the wait at CBR. Will be interesting to see how they handle the CBR merge. Do people getting off the transfer gondolas get a different line than people "walking up" from CBR. (Note that most people at CBR will not be walking to this station - it is close to very few units, and most will need to bus to get here.)