[joakleaf]

Does the survey account for the number of phones that are sold with audio jack headphones?

It could be that the only reason bluetooths outsells jacks, is because people get jacks anyway for free.

[randomdata]

Does it matter in this case? If the remaining headphone users stick with whatever headphones come packaged with their phone for free, then they still wouldn't be using the audio jack with the iPhone 7, as the iPhone 7 comes packaged with lightning headphones.