I avoided singling out the larger corporations at the end of my comment (Starbucks, McDonalds, Dunkin Donuts) as I don't have any friends who will be working service jobs for these chains.
I graduated undergrad a couple of months ago, and I do have a fair amount of friends who gave up looking for work in the finance/startup field full time and are now working at trendy restaurants/bars in the SF NY area to make ends meet while searching on the side. Anecdotal evidence, but that's what I've seen.
I would also add that despite quoting juicy statistic from your article, you don't seem to have read it accurately - there's no about how many baristas have degrees. The only comment is that 25% of all employees have degrees. I don't have the data tell what the chance is that the average Starbucks barista has a college degree but I'd claim neither do you if you're just going by that article.
50% employees are baristas.
35% are shift supervisors
15% assistant store manager or higher in the hierarchy
Which means the odds are overwhelming that every employee you interact with in a normal Starbucks doesn't have a college degree. So why this view that college grads are flocking to Starbucks because they can't find jobs.
In fact, Starbucks has started the free college option to make sure that even non-degreed people will find Starbucks attractive enough to apply. [2]
[1] http://www.bloomberg.com/bw/articles/2014-10-07/starbucks-is...
[2] https://news.starbucks.com/news/starbucks-offers-full-tuitio...