The sales volumes of the 1TB+ models has got to be fairly low, which makes this fascinating. Since they are being somewhat quiet about it (rather than trumpeting "the 1TB+ models are even faster!") it suggests the P-cores don't yield well enough to support 4 P-cores in the 256GB and 512GB SKUs.
I actually wonder if the 1TB+ models of the iPad Pro represent a higher portion of all models sold than that storage capacity would in other product lines. The iPad Pro is such a niche, weird device; it feels like if you're buying it, you're buying it for something, probably media production related. Its not a Netflix machine.
