As someone who takes 5-7 extensive vacations a year plus several weekend jaunts, I will say that I feel the Disney deluxe resorts absolutely fall in the 4-star category. There is a huge gap between a 4 and a 5 star property and there is a very wide range within each category as well. I've stayed in basic 3-star Hiltons as well as famous 5-star properties such as The Ritz, The Madinant Jumeirah, The Louvre, etc.
We just returned from a driving tour of southern Spain and my dh said we should try 4-star hotels instead of our usual 5-star. So I booked all 4-star hotels, all with good customer and professional reviews. Ha! Boy did he regret saying that. None of the hotels we stayed in were up to the standards of the Disney hotels I've stayed in. And all for various reasons--one would have a great champagne breakfast, but with worn down rooms, while another had a single, terrible restaurant but with amazing views of the city.
The star system is based on amenities not reviews or customer service. There are several organizations who come up with the ratings, so that 1 property can be rating in several categories by different organizations. The Disney deluxe resorts are rated for stars for their amenities such as:
-Bell service
-Concierge service
-Option of club level
-Turn down service (only club level, which IS outside the norm in US, but not abroad)
-Extensive pool and recreation area
-Kids' club (not all have, but all have access to)
-Variety of dining options (I've been to some 5 stars with only 1 restaurant)
-Curb appeal
-Lobby with seating
-Easy access to local attractions
-Room service
-Valet parking
-Fitness center
-Free WiFi--Last month I paid 3 euros an hour at the Four Seasons in Limassol, Cyprus.
Of course they fall short in:
-Small rooms (but if you really want to see small rooms, stay at Le Grande Paris, where a mouse scurried across my feet while I was dining at the famous Cafe de la Paix. The waiter told me I was being "irrational" to be afraid of "a little mouse." Imagine if a waiter said that to a customer at V&A or even Flying Fish!)
-No "wow" factor in individual rooms (though I find this all over)
-Personal Service--However, I believe that CL usually does a good job of this.
-No turndown service for non CL guests
-Overcrowding, tight accommodations
-Long hallways or other circumstances that make can make it uncomfortable to guests to get from point A to B.
-Lack of dining in that if you don't have an ADR, you might not get anything to eat despite the fact that your hotel could have 3 or more sit-down restaurants.
-Mousekeeping often, for lack of a better word, sucks.