It looks like Apple employees are using the yet-to-be-released iPad to test iOS 6, according to Ars Technica. Apparently, Ars has found 365 visits from devices with a resolution of 2048 x 1536 — the exact resolution expected to be in the new iPad.
Finding a device with similar resolution isn’t a big deal in itself, as there are monitors at the same size (though very few). But when you pair the resolution it with the discovery that those same devices originated from Cupertino, and appear to be running iOS 6, you’ve got something. The iPads also appear to be running a newer version of WebKit — 535.8 compared to 534.46 for the current versions of iOS (iOS 5, iOS 5.0.1, which is available to all iPads, and iOS 5.1, the developers beta).
iOS 6 is not expected to be released until WWDC in June. Apple usually does extensive testing on iOS before any release, so finding data of the next iOS release four months (the data is from February) before its expected release is not unlikely.
The next-generation iPad will be announced on March 7th, with an expected release date of March 16th. We have also confirmed that the device will come with a A5X 1.5GHz dual-core processor, and LTE.