What does Mixpanel think about adding statistical significance where appropriate? Take the Fbconnect and nonFbconnect users vs song engagement in the video. The chap in the video was fairly certain there was no significant increase, but visually it looks as if there in fact
was have a slight, but significant difference between the two patterns of engagement. Impossible to tell without some sort of statistical analysis. There are probably lots of cases like these if your offering is fundamentally sound.
If I was the guy that championed and implemented FBConnect in my app and one of my co-founders thought that based on that graph there was no significant difference I'd be pretty pissed off.