This article is absolute rubbish: It IS common knowledge around the technology world that Apple is planning on dropping Samsung as their FAB for the Ax chip but here are a list of problems with the article:
First of all: the A4, A5, A6, A7 ... are NOT CPUs, they are SoCs. There is a significant difference as a SoC contains ALL the things required to make the device work (CPU, GPU, memory controllers, etc) not just processing cores. This is not like an Intel processor that only has CPU cores (even Intel CPUs are also moving more towards the SoC class).
Secondly: Apple looking to move to TSMC's 16nm FinFET process? REALLY? TSMC's 16nm process won't be ready for over 2 - 3 years, longer if Apple is requiring 130million + units each year. The smallest size that Apple will be getting TSMC to make for them at first will be 20nm, and I wouldn't be surprized if Apple's first chip at TSMC will be 28nm!
Thirdly: You CANNOT compare the A6 (and future A7) processor to the memory chips. Apple buys the memory chips from companies like Samsung, Hynix and Micron as a premade DDR2 product. They have to conform to the DDR2 standard so no extra modification is needed to drop a Hynix product in place of a Samsung product. Custom made CPUs require millions to convert a design into a production ready product, and since FAB company has a slightly different process (SAMSUNG using GATE First, TSMC GATE Last) it takes months and lots of money to switch between manufacturers. So there is not point in comparing Memory to CPU production.
Lastly and most importantly: This is OLD news. TSMC reported that Apple (and Qualcomm in an unrelated event) offered 1 Billion USD for guaranteed FAB space. This is just crappy journalism to capitalize on the new Apple Iphone hype (which isn't that big as the phone is (again) a disappointment!)
Tom's should fire these lazy, useless Journalists!