You do realize Samsung isn't the only phones with larger than a 4" screen, right? S4, LG, G2, Nexus 5... the list goes on. The problem with this graph is Apple is the only manufacturer selling a phone with iOS on it. Look how many companies sell Android phones. A more fair comparison would be Apple vs. Android phones. If you add all the other companies that make Android phones up, it clearly blows Apple away. I'm sure if other comanies made phones with iOS on it, it would not look nearly as skewed as it does here.
I do realize it just as I know you realize the vast majority of Android phones by all manufactures are not large screen models -- those are just the ones that get the attention. Also I know you realize that my post was about phone's screen size not OSes. And finally I was really being sarcastic about all the iPhone fans saying Apple is doomed if it doesn't release a large screen phone -- that the current size is a deal killer. You do realize all that right?