Depends on what you see as general. Nobody would have such "proof", that's not how it works. The data shows a trend. From that we can draw conclusions. It's not flat-earth thinking like someone here said.
Well, ''Out of Africa'' isn't the only theory. There is also the theory that modern humans first appeared in the Central Asian Steppes/Middle East or it is a case of both.
If subscribing to ''out of Central Asia/Middle East'' read up on what the Alans and Hephthalites (''white Huns'') looked like. The Alans found their way in to Spain, along with the Vandals (tall blondes from Scandinavia) and Goths (Germanic and Slavic folk).
The first modern humans in Spain migrated out of Central Asia during the Ice Age.
Think about the difference in climate between sub-Saharan Africa and the Steppes. More importantly, how much colder the Steppes can get and how this affects evolution. If you have humans evolving simultaneously in both areas they are going to look very different.