Mensa work out is it a pisstake?

Is 73% at all good in 18 mins or does it just prove im 17% away from being entirely retarded.. I know its not anywhere close to the real test, but surely something that is supposed to be so profoundly elite, they would add a bit more complexity to their questions? The test was incredibly boring and required no real thought. If I took longer to absorb some of the questions I probably would of scored higher, but the point is the answer as quickly as possible as best you can?

I think I might just be stupid.. or paranoid. I need some light on this?