Once again, you are just making this stuff up. If you go to tripadvisor nearly restaurant, hotel and attraction is top heavy with 4's and 5's. It is rare to find any place with more inferior reviews than positive.
I'm not making it up. It's my opinion. And as an analyst by profession, my bosses would not be happy if I could not substantiate any ranking without the numbers behind it.
What you quoted from TA does not tell tell us how they did it, it merely uses buzz words to make it sound like it was scientific.
If most attractions, hotels etc are 4 and 5s then they must have done something else than an average rating, else they'd all be pretty much 4.5s and rating one to ten not really possible.
There is no way that they read all the reviews, so did they search keywords from the reviews, e.g how many times the words 'Excellent Service' are used?
We'll never know, but in my
opinion this ranking is as meaningless as the TEA rankings - massive pinch of salt required.
Interestingly, in the UK rankings,
http://www.tripadvisor.co.uk/TravelersChoice-Attractions-cAmusementParks-g186216
#1 Alton Towers - expected.
#2 Peppa Pig World - very popular with the under 5s.
#3 Adventure Island - a park no further than 4 miles from my home.
Thorpe Park, Chessington and
Legoland do not feature in the top 10 and are major theme parks in the UK which along with Alton Towers probably take the bulk of UK Theme Park attendance. They also give you much better themes, rides and shows than my local park at #3.