GNSS
While it's tough to tell what GPS solution is in the iPad Air 2, it's likely that the cellular version leverages the Qualcomm modem. Once again, it isn't quite possible to test cold starts on iOS devices as airplane mode disables location entirely. Given these restrictions, it's still possible to test general performance. In the case of the iPad Air 2, I measured around 15 seconds to first lock, and it seems that in general the GNSS solution is more than capable.
Misc.
Unfortunately, it seems that for now it isn't quite possible to do a controlled test of wifi performance on iOS as all available options are nonfunctional for the forseeable future. While I don't have the equipment to test speaker loudness or quality in general, subjectively it seems that the speakers are quite loud and can make the entire tablet resonate. I've also noticed at times that the orientation sensor doesn't seem to be active at times as I've had cases where the tablet won't rotate the view until I change the orientation again or check the control center and toggle the rotation lock.
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