We always walk. One night, we wanted to get from IllumiNations to Osbourne Family lights at MGM. It was about 9:30 or so when IllumiNations ended, and we needed to be at MGM before they closed at 10:00. We made it in 23 minutes...no, it wasn't a leisurely walk..more like a race walk type stride, but we made it. Normally, it takes me about 15 minutes to make the walk from the entrance to MGM to BW, walking at a nice pace. Add about 8 minutes to get to YC. But, when you get to the end of the walkway, do not go right. Head left, up and over the bridge to S/D, and stay with the lake on your right. You will end up at the Marina. If you take a right at the end of the pathway, you will have the lake on your left now, with BW on your right. Yes, you will get to where you want eventually, but it is about 4-5 minutes longer this way.
We don't take the boat from MGM unless we can board it without a long wait. If you get there, just as a boat is pulling in, and can hop on without a long wait, then sure, go for it. But, you could get there just as one is pulling away, you then have a 20 or so minute wait for the next one, then add on 5-10 mins for the next boat to unload, and then load up again, and the 15 minutes to make the run to the resorts.....well, it can be much quicker to walk.