If this is true, then it would be PASemi teams first product - after 4 years! That is a long time for this much hyped acquisition to be paying dividends and after all that the performance is comparable to the A15? That is a shame.
First die shots are over on anandtech. Confirms dual arm cores. Also confirms 3 gpu cores (543MP3). Now where is that techinsight article that was posted here a few days back that stated the gpu was being switched to Mali ?
It was anandtech that first came out with the "speculation" that the A6 has some in house cores rather tahn A15. Linley and others are merely embellishing in that. Best to wait till someone like Chip works does a teardown on iPhone 5 and carries out a similarity analyses with SoCs following pure ARM designs - like Samsung's Exynos in the S3.
I would contend that the difference between a custom core from Apple and the Cortex-A15 from ARM may not be the black and white choice it is at first glance.