Yeah I've experienced the first one. I accepted a position somewhere else long before, but by the time one of the companies had gotten back to me, it had been 7 months since I applied.
Careful, if you talk about how the USA's H1-B visa program is a steaming pile of horseshit designed to allow corporate America to commit fraud and give away 80,000 skilled jobs a year to underpaid imported workers instead of paying market rates to well-qualified US citizens and green card holders, you might get downvoted. Folks here have trouble with balancing their hatred of corporate America with their hatred of the word "citizen" being used unironically.