First off, I will say, I've posted on TripAdvisor for a long time...Got the TripAdvisor hat, button, the whole deal. That said, TripAdvisor has the tendency to be either hot or cold. Actually, they have had complaints filed with multiple advertising standards agencies and formal inquiries have been filed regarding "abuse, flaws & distortion" alleging they have reached large proportions upwards of 25% of the reviews being bogus. Honestly, I think they are probably plagued with fake reviews, especially in popular vacation spots.
HOWEVER, and it's a big HOWEVER...An open, inquiring mind can sift through them in a number of ways, some of which have been mentioned in the above posts. Read the negatives and see what went wrong with their visit. Sometimes, it truly is NOT the hotel room. See how many posts this reviewer has made. Do they have an ax to grind, it is their first post? I average the reviews after seeing what was posted and why. Even the most stellar reviews have NOTHING to do with the resort, only the reviewers total vacation experience. So it goes both ways.
Disney is its only entity in every single way...food, lodging and entertainment and you can't compare the entire experience package with a week stay at the Four Seasons. It's definitely apples and oranges. Like a previous poster mentioned...I've had a room at the Hampton Inn that did surpass our room at POR. Did that make our POR room awful, no; our trip, ruined...NOPE!
The thing I find to be most noteworthy is this -- People who don't plan and read and educate themselves before a WDWtrip, to me, can be easily disappointed in certain things - transportation, lodging, food quality because they compare it to other venues, ie., a week at the Ritz Carlton Kapalua vs Grand Floridian...and you can't do that necessarily.
The whole commercial about, I won the Superbowl, I'm going to Disney World- yeah, right! Maybe because you're a millionaire, but the rest of us schmucks need to plan a little farther ahead!
Information/knowledge is valuable and powerful. Pre-conceived notions can be a vacations demise. I've read horrifying reviews about some 5-star Hotels I've actually stayed in...you just never know, until you go...with some advanced reading, at least. Just my 2cents.