I'm not sure where your getting your info from, but I would say the Hogan test is the hardest part about getting hired. I know quite a few people who did not pass the Hogan portion and therefore aren't given the oppurtunity to interview. These are people I really enjoyed flying with and in my opinion have great personalities. Not sure what "personality" United is looking for, but I would guess much more than 1 out of 10 don't pass that test.