[verelo]

I think it depends on a lot of factors. i.e. how much money you have, education background, prior experience and very significantly the country you're coming from.

Not to discount your experience, i am sure you've been through a lot of paperwork (i know i sure have, and i'm yet to meet someone who enjoys immigration departments!) but the US is pretty damn tough if you are not a) wealthy and/or b) highly educated and in demand.