Right, he did change the settings. I've pushed for fairly conservative default settings. The unfortunate reality is the optimal settings are very dependent on prop, esc, battery, diameter, etc. Until we have one-platform-to-rule-them-all if you want the best performance you'll need to spend a bit of timing tweaking the settings.
For UAVs this gets worse and the build on top of guidance tier on top of the other settings.
One of the things we've discussed in the long run is self tuning though, but for now we've tried to describe it fairly simply on our wiki.