if you have time i think it is better to go to nepal to get visa stamped. i got my visa stamped recently in Matamoros, Mexico. there were around 20 people for H1-B visa. everybody got visa stamped same day. some got within 3 hrs some had to wait till 3pm. but i was only unlucky to wait for next day. visa was apporved but so called system didn't release my visa until next day. there was one hispanic guy who was Coordinating some indians and pakistanies. i assume he was some kind of service guy who charge to get mexican permit and take you to counsular office and bring back to border.