Let's LOOK at the numbers:
iPad Air at 1.4GHz. Geekbench single core rating is 1371:
To quote from Geekbench: "Geekbench 3 scores are calibrated against a baseline score of 2500 (which is the score of an Intel Core i5-2520M @ 2.50 GHz)"
Scaling that 2500 to 1.4GHz would give a rating of 1400. Like I said --- equal IPC.
Don't agree with that? OK, let's try a different Intel chip.
This gives us a single core score (for a Haswell i5 iMac, 32-bit mode, 3.2 GHz) of 3304. Naively scaling that to 1.4GHz we get 1445. Same sort of ballpark. 64-bit mode would increase the value by a few percent, but same basic point --- a Cyclone core is about the same IPC as a an i3, and ever so slightly behind an i5 and i7 (which have larger L3 caches, probably a slightly better memory controller, and a bunch of features that help with larger benchmarks but not so much with Geekbench).