[tigertigertiger]

I think that there is a general misconception in thinking that Mensa beeing "highly intelligent under-achievers". People that are not putting hard work into something are under-achievers in any demographics, because that's what the word implies. It's not a inherent problem in Mensa. Being lazy is the norm, it makes sense from an evolutionary perspective, being an over-achiever is something that has to be trained.

[JoeAltmaier]

There's an expectation of more from a super-smart person. It should be so easy for them. But as you say, it doesn't happen but rarely.