Distimo just released its statistics on Christmas Day app downloads and revenue growth… and the download spike is far smaller than it was last year. Back in 2011, Christmas Day iOS app download volume spiked 230% above the December average. This year, the increase was just 87% — far below industry expectations. The revenue spike came in at 70%.

Interestingly, iPad downloads increased by 140% this Christmas, implying that the iPhone download bounce was really modest.

A few weeks ago, AppAnnie released statistics showing that iOS app revenue growth had stalled over the summer of 2012, whereas Android app revenue growth was relatively strong at 48% over a five month period. Both Distimo and Appannie are respected companies and their analytics are closely followed by app industry professionals. Could it be that the pace of iPhone app revenue growth has slowed down sharply from 2011 levels, even if Distimo and AppAnnie numbers aren’t entirely accurate?