Where is the demand - in the 4.7" or the 5.5" regime?

Smartphone share based on screen size (via TechPinions)

Smartphone share based on screen size (via TechPinions)

Apple's best quarter in terms of pure sales has always been the holiday quarter (in USA). Last holiday quarter Apple sold more than 51 million iPhones alone. And this time thanks to the latest iPhone upgrades from the company, analysts expect Apple to sell around 65 million or some even more than 70 million iPhones. Question is whether Apple can produce so many phones in a short time to meet the demand and this has always been the question. After all if your demand is higher than your supply, it is a good thing, isn't?

Our educated guess is, in Asia and markets where phablets sell well, the mix will be 65% iPhone 6 Plus and 35% iPhone 6. In the US and Europe it could be switched — 65% iPhone 6 and 35% iPhone Plus... We are hearing about some early surveys and, to my surprise, there is a lot of interest in the 5.5 inch iPhone.
— Tim Bajarin (TechPinions)

Anyway this TechPinions article rounds up well on what the iPhone sales split between the 6 and 6 Plus might be and how it would depend on the country. For example in Asia everybody expects the 6 Plus to sell equally or better than the 6 and in US the 6 might outsell the 6 Plus by 2 to 1. There are two things I have noticed around me and around the sites I visit on the Internet on this topic. One is that the interest in 6 Plus is much higher than what I (or for that matter anyone) expected. Almost 9 out of 10 people I spoke with want the 6 Plus, mainly for its better internals (like bigger battery and better camera). But also the select few who actually got to see the phone close enough or some even luckier ones that got to hold the phones in hand, quickly changed their minds from the 6 Plus to the 6, citing the humungous size of the 6 Plus. So I think for people who have never used a "phablet" before, you are going to be surprised how big the 6 Plus actually is. My advice is make sure you try to use and handle both of the models before you make a $1000 purchase (like this Verge guy).