It may not be a popular thing to say on HN, but in my experience it seems to fit the data.
Thankfully, I think that segment is starting to dwindle as they realize they aren't getting rich quick.
No, seriously. The defining characteristic of a startup is that it's designed to grew its revenues many orders of magnitude faster than its expenses in anticipation of a very large exit. That is, quite literally, "get rich quick."
It may not be a popular thing to say on HN, but in my experience it seems to fit the data.