I Agree with serveral others. With 3D the view seems to be same regardless of where you sit. I've found this true at Disney and Universal.
Viewing a 3D film is
not the same from each seat in the theater. Will you be able to experience 3D in general? Yes. Is it the same? No. Unfortunately, the theme park employees are lying to guests when they suggest that viewing is the "same" from everywhere in the theater.
Without getting too technical here (there are plenty of articles online for those interested in the science), 3D viewing
does have a "sweet spot," and that tends to be in the center of the audience. This is due in part to how the illusion of 3D works; although objects appear to move in three dimensional space, the physical distance between the viewer and the the display plane (the movie screen) never change. In real life, of course, objects appear to move forward and backward because the distance between the object and the viewer changes. This limitation (no change in the distance between the viewer and the screen) is one of the criticisms for why home-based 3D will never "take off" and become generally accepted as the next widespread entertainment medium.
The Spider-Man attraction at Islands of Adventure is revolutionary in that the 3D projections change and adjust in perspective to account for the moving ride vehicles - which move side-to-side as they pass by the screens. It actually appears quite odd of you watch it from a stationary position (go on youtube and watch any behind the scenes footage of the attraction). Similarly, you can try walking past a doorway and looking into another room. Your perspective of vision into the room changes as you walk by it.
So, if there's a scene in MuppetVision or Philharmagic that looks straight down a hallway, it will only appear natural if you are seated in the center of the audience. Much of Tough to be a Bug is displayed exactly from this perspective. If you are on the left or right side of the audience, the perspective down the hallway will not appear natural, because you are being artificially forced to "see" from the center perspective.
This "flaw" in 3D technology is not as obvious in attractions like Star Tours, which are very fast in visual movement and don't provide as much time for the viewer to "process" how unnatural the viewing perspective is.