I was also shocked by the % of people who think they can get a new online gig in < 24 hours. The slides pointed at Upwork and ThumbTack. The first seems to be a renaming of oDesk. It seems to be dominated by workers from outside North America (at least for tech work).
This also raises the larger issue of career for GenXers. I was at a conference recently and spoke to some other people my age. The collective feeling I got was there is no defined career track anymore. Apparently, you just move from one interesting gig to another. While this is something millennials may be totally comfortable with, this particular GenXer is not. I'm also reading a book (interesting and depressing) called "Company of One" that seems to suggest that the overall trend is not restricted to millennials but the economy as a whole.