The H1B process is slow, but pretty much deterministic within a period of few months (every year). On the other hands, the EB1/2/3 and various O visa is very in

The H1B process is slow, but pretty much deterministic within a period of few months (every year). On the other hands, the EB1/2/3 and various O visa is very indeterministic (you won't know what happen, for how long), especially when those varies depends on the country of origin.