FAKE! We obviously don't have 2 dollar coins.
Why, no, Americans don't. But Australians do and they were the first country/timezone to realize the iPhone 5 today. So that's where iFixit went to go do their test. If they needed a coin to do their scuff tests, that may just happened to have been what the tester had had on him at the time.
Also, FYI, Canada also has a two dollar coin. The EU has a two euro coin.
Just because America is left in the dark doesn't mean it doesn't exist.