You can also walk from the Studios to the Boardwalk. About 15-20 minutes long depending on how fast you walk. Just walk around the lake away from the Studios entrance and continue straight to the Boardwalk.
If you are in no hurry, the boat is a nice relaxing ride....but slow.
Note that the boat stops at the Swan/Dolphin, Yacht/Beach clubs and Boardwalk before continuing on to Epcot. This is why it takes so long.