To the extent that a dictatorship is doing well, it is evidence against the idea that democracy is the natural way to have a good economy.
That said, I don't think those states are doing *well enough* to justify such a fear. What we're looking at from the outside are basically the promo reels from a version of Disney Land made for people whose childhood dream wasn't to be a princess or a knight, but a CEO with a Lambo; what the kids see when they visit Disney has little in common with the effort needed to present the park.
Not a great car wash but probably $5-10 on the low end.
One should be uncomfortable the Arab States are doing so well. They have no democracy but seem to be thriving. Not expected post 9/11 imo.