It's also caused by more traditional media outlets too.
"Top X entrepreneurs under 20"
"Website X was making $50k/mo in 6 months"
"I just tinkered on the iPhone a bit and now I'm making $2k a day on this little app"
I love the NY Times, but they're chock full of this crap. I guess nobody wants to read a story about "I worked 2 years for nothing, now I'm making slightly more than nothing. Maybe in another 5 years I'll be making enough to equal a decent entry level programming job at MegaCorp."
"Get out there and sell something now!"
"Look what wicked awesome thing I made in a weekend (weekend wink wink nudge nudge)!"
"Make sure you know when to pivot/give up!"
"With adwords yo can validate a market/channel/idea in just a couple days!"