I understand that. I was just pointing out that at this moment in time FaceID is not yet the most popular method used on iPhones.Of course there are more TouchID iPhones than FaceID iPhones in use. FaceID has only been around for a little over a year. TouchID has been around since the 5S.
It would be like saying that standard pass-code iPhones outnumber TouchID iPhones in the wild about two months after the iPhone 6 was realeased. It takes time.
It'll probably be 2 to 3 years before FaceID outnumbers TouchID, assuming flat sales and a 4 year replacement cycle.
FaceID has been out around 14 months so it’s not like comparing it to the passcode after only 2 months of the iPhone 6 being on sale. If you want to compare that then you should compare it to this month in 2014. The difference there is the iPhone 6 was hugely popular with a larger chunk of the market but FaceID has only been on an affordable iPhone for barely a month now.