I went a couple of weeks ago, including a Friday night Boo Bash. We had a party of 8, and "raced" to the MK from the GF via the various transport option several times. We split up between the Walking Path, Boat and Monorail. I always took the walking path on an ECV/
Scooter, so I was going at pretty good clip (my teens were at a brisk walk). The rest of the group would split between the monorail and the boat. On the way to the Magic Kingdom, the boat nearly always beat me to the MK by about 1 minute. On one occasion I beat the boat by 1 minute. The boat comes to the GF dock very frequently and goes straight to the MK (it does not stop at the Poly). While on the walking path I had fun waving to my crew on the boat and often to the boat captain, who had been informed that we were "racing". The walking path and boaters usually beat the monorail riders, which surprised me (maybe just timing with the arrival of the monorail... I don't know). Prior to this experiment, I'd have assumed that the monorail would be much faster, but that's not what I experienced. On the return to the GF after Boo Bash, most of my group was tired and opted to take the monorail. I dallied at the MK doing some shopping. I left probably 20-30 minutes later than those who'd taken the monorail and returned via the walking path. I was sitting by the marina enjoying the night view of the castle when to my surprise, here came my monorail group. I'd left the MK 20-30 minutes later and beat them back to the GF. They literally yelled "How did you beat us?!" I was surprised.