hahaha 9to5mac!! THE MOST APPLE BIASED SITE ON THE WEB!!
And 37 million sold as of the last quarter and most recently the iPhone becoming the number one smartphone sold in Canada. Would state that plenty of people are MORE then happy with the iPhone's screen size seeing as they all have choice not to buy an iPhone, also according to wikipedia:
http://en.wikipedia.org/wiki/IPhone
the sales figures show a massive increase in the last half or quarter. Now that could be old 3G and 3GS owners upgrading but the figure just seems far too high to be based solely on that, no I would say plenty of new people are buying iPhones.
So you can produce all the percentages you want, Apple's sales figures do not lie and consumers have had the choice of bigger screen phones for a while now.
Sales figures don't really tell the story though. There is only one size and that's it. Yes, it was very successful, but so are Apple's other products. And the website being biased to Apple means what??? That is what we are talking about, people who use the iPhone want a bigger screen even if Apple says no. Like I said, I will always buy an iPhone because its the best os, but given a choice in screen size I would choose a bigger phone and I am sure I am not alone.