"Flocking" = we don't have any real numbers but here are a couple of people who went to the US and then came back, and look! we use that unicorn word that no current startup article is complete without so you can trust us.
Not a great article, it needs to note the majority are simply going home either because of inability to maintain permission to remain in the US or the inability to find a job they want.
Nothing wrong with that
I personally think there is something wrong with having to leave a country because you can't maintain permission to be there, but then again I'm an open borders guy.[0]