I wouldn't say they were misinformed. While the lines do move relatively quickly; they can still get very long at park open close. On our most recent trip it took us 45 mins to get on the sklyiner from Epcot at closing and 25 from dhs. - And those were both weekdays.
If you're not needing magical express, we'd definitely pick Dolphin over CBR.
I also echo those being mindful of weather. I actually think skyliner resorts are at a disadvantage during the rainy months, as then the skyliner goes down often and it's a mess trying to get transportation at that point. Last summer when we were there, it seemed the skyliner was down at least once a day and when it was it took a decent amount of time for them to start running buses and for Epcot as an example, we had to walk all the way back through the park and out the entrance to a bus stop.
I know others won't agree, but if you're going during rainy months, I'd avoid skyliner resorts.