We will know that Iran has turned around when we witness anti-Islam protests.
I think they've been going on --- but the MSM here doesn't seem to want to report on them --- for example this one --- did it ever make it into the news here? Yet I think this kind of thing would be important --- it was over a year ago.
http://www.shianews.com/hi/asia/news_id/0001722.php
Iranians chant 'Death to Khamenei'
Religious militants on motorcycles chased down reformists and beat them with clubs early Friday, the third night of anti-clergy demonstrations in Tehran. Witnesses also reported seeing mullahs pulling young women out of cars and beating them with sticks.