Rene Ritchie, writing for iMore:
Apple's platform technologies team doesn't have to worry about being hobbled or constrained in any way — all they have to do is run iOS and iOS apps faster than anything else on the planet. That's their only customer.
It's hard to overstate just how big of advantage custom silicon is to Apple. I joked on Twitter the other day that the headline of Rene's article could've been "Johny Srouji's team kicks total ass."