So you have No answer to your Self-Impeaching "COUPLE of Exceptions".
OUCHER.
A "Couple" is plenty to make the point.
Let me add to my point/Your being Porked with this...
http://www.migrationheritage.nsw.gov.au/objects-through-time/essays/50000-years-before-present/
Our species evolved in Africa over 200,000 years ago. The Genographic Project has found that people spread out of Africa in at least two migratory waves.
The first wave travelled from eastern Africa into the area of the east coast of the Mediterranean known as the Levant about 100,000 years ago.
The later second wave moved from Africa into the Arabian Peninsula and continued eastward following the coast of South Asia about 70,000 years ago.
This southern wave kept rolling along reaching Southeast Asia, where one branch of people migrated to Australia and New Guinea, while other branches moved along the coast of east Asia. A branch of this
second wave migration moved north into the central Asia and spread west into Europe and east into Siberia about 40,000 years ago. Eventually humans made their way to the American continent about 15,000 – 20,000 years ago.
The actual timing of the southern wave of humans is hard to ascertain because it appears to have moved along the coast, where after the end of the last Ice Age 12,000 years ago the melting glaciers drowned large stretches of coastline so the evidence is now under the ocean. The fossils we have of these migrants offer few clues as to what sparked their spread.
Damn good!
So again, MY divergence starting 50,000 years ago is quite a decent estimate, even conservative.
And not that 10,000-15,000 years wouldn't be enough to develop subspecies.
THAT time period Previously Elucidated by me/my links as well.
Again, do chirp in when you have something on the string topic you admittedly/pathetically do NOT have now.