It's great to see those charts. You're conflating iPhone and iPad rankings though.
~10 sales/day won't get you into the US Music top 100 for iPhone since iPhone is a bigger market than iPad. Yet that 80 sales/day number is for iPhone. That's making the extrapolated bit of your chart steeper than it should be.
Unfortunately, I don't. I have two paid music apps but like yourself, only have good data for lower portions of the charts. Plus it's tough to pick apart iPad vs iPhone sales for universal apps.
If I had to guess, it's probably about half of iPhone, but don't rely on that!
I started prototyping something along these lines a couple months before Messages was announced. The idea was to make a (commercial) next-generation IM client for the Mac with a more modern UI. I stopped working on it when the first Messages beta was released, figuring that it added most of the UI things I wanted, and that if it shipped with OS X for free, few would want an alternative.
Now I wonder if dissatisfaction with Messages is high enough that there's an opportunity again?
If you're interested in this stuff and want to talk about it, drop me an email.
Those look like parabolas, which implies that there's something O(n^2) going on. Since autolayout has to evaluate each constraint against the other constraints, this shouldn't be too surprising.
Like other commenters, I find the 1,000 subview test runs pretty silly. (Pro tip: if you need to put thousands of things on the screen, you don't want to give each one its own view. They aren't that light no matter how you lay them out).
This stuff is pretty clearly optimized for use with a handful to a few dozen views. It would be great to see a performance comparison for that range.
If you're thinking of selling an app, do you feel like the tools are there to find buyers and perform the transaction?