TechCrunch:

As of 4 PM Pacific, the iPhone 6 accounts for about 2.45% of the devices MixPanel is seeing in use. The iPhone 6 Plus, meanwhile, makes up just 0.31%. Everything else (that is, every previous generation of iPhone MixPanel still sees in the wild) makes up the other 97.24%.

This data is pulled from mobile analytics firm MixPanel (subscription).

It’ll be interesting to watch this graph over the next few days; on day one, at least, the margin between the two devices seems to just be getting bigger and bigger. Given that both devices are widely sold out, this could also imply that Apple made way more 6s than 6 Plus. If that’s the case, will the gap close as Apple becomes able to meet demand… or will most would-be 6 Plus owners have given in and bought a 6?

Or is it simply that the much larger size is still emerging as an acquired taste, that the iPhone 6 is already a step in a new direction for most buyers? It’s interesting to note that we no longer have a smaller form factor as an option. When the iPhone 5 was introduced, the shorter iPhone 4 form factor no longer sold through the traditional channels.

When the iPhone 6 was released, the iPhone 5s was not updated. Presumably, over time, the iPhone 5s form factor will disappear and the iPhone 6 will become the new normal. As users acclimate to this new standard size, and as more and more Android users make their way across the divide, I suspect the iPhone 6 Plus will gather momentum.