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Many people don't realize just how "westernized" Iran became in the last century. I put that in quotes because it includes both the bad and the good.
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Yeah Iran has changed a lot. I think the Islamic Revolution also happened really at the wrong time, right bang on the moment of transition in Iranian society. The government suddenly starts promoting Islam when the people are becoming more secular. This bad timing has also made a lot of Iranians become really anti-religion, and often even anti-Islam. It's quite unfortunate, because I also find that sometimes among Iranians they can be a bit 'extreme', and deliberately not associate themselves with fellow Iranians just because they decide to not eat pork or maybe wear a headscarf.