You have zero way of knowing this because you don't know how many iPhones were tested in each group, their individual values, and hence the standard deviations of each group. So before you want to spout your mouth off with garbage, like Jobs once said, go educate yourself.
Just looking at the graph. Chill.
How utterly predictable, of course if the changes were opposite you would be raving about the brilliance And genius of apple and their ability to make the greatest invention in history even better.
According to the graph, the changes don't appear to be that significant. Am I wrong? I don;t see any major deviation. The only thing that stands out is 3G data, and it doesn't seem that bad.
LOL what else would you have me say?