Update: @planetbeing has since confirmed on Reddit that the below photos are fake, or at least not beta tests of the evasi0n jailbreak. Since the iPad mini does have the A5 processor, however, there is a slim chance that this is a separate jailbreak — one that has not previously been seen.
The release of the iOS 6.1 jailbreak is right around the corner, and if pictures posted on Instagram are any sign, evasi0n has been released to a select few private beta testers. That said, there is a decent chance that these are completely fake and have nothing to do with evasi0n whatsoever.
The following picture was posted on Instagram this morning by Twitter user @avisetia:
The user also posted a picture of the Cydia home screen: