I finally succumbed to curiosity today and took the test and got one wrong and thought, "Dang, I didn't do as well as zoethe did."
I'm not sure that taking and posting internet tests in and of itself is stupid. Maybe it's more a sign of either boredom or lack of time to post anything else. Or maybe it just shows curiosity in the test and amusement at the results. ^_^
Regarding 99.7%, it's CYA I bet... They couldn't possibly tell people that they are smarter than 100% of the rest of the world; think of the lawsuits that would ensue when someone got their bubble burst! ;)