I studied (early 1980's) Control Engineering in London with both Iranian and Israeli engineers. There wasn't any real difference between their levels of ability. Iran is, what 1/3rd the population of the US? Its bigger than the UK and has spent decades working on their independent military technology. Do not underestimate them.
U.S. to deliver 8 advanced F-16s to Egypt on July 30-31, U.S. embassy in Cairo says (Reuters)
from the article: Iran: We've produced domestic version of S-300 anti-aircraft missiles