Curious how many iPhone 6/6s/Plus users have an iPad as well. My theory is that an iPhone 6/s is the ideal option for those with the iPad Mini and a perfect combination with the iPad Air, whereas an iPhone 6/s Plus makes the iPad Mini redundant and potentially makes the iPad Air unnecessary for many as well.
(If you have multiple iPads just choose the iPad you use most often.)
(If you have multiple iPads just choose the iPad you use most often.)