As of Jan 2013, is Siri available on the iPhone 4?

The most recent info I can find on this is that Siri is only available on iPhone 4 through jailbreak, but once done, you can't get to the Apple server. So no to Siri on iPhone 4. But all posts are a year or more old. Any positive updates here?

No unfortunately not. The apple website still states siri on 4s and 5.

No, it's only available on 4s and 5