It certainly isn't my field, but I have to wonder how accurate the genetic clock really is...

On a tangential topic,
Most people that have family that has Oklahoma roots that go back a number of generations also have family rumors or legends that they have native American ancestry...

This was true of my maternal side of my family, and is also what got Elizabeth Warren in trouble...

The development of genetic ancestry testing allows this to be put to rest.

My maternal uncle took a genetic ancestry test, and it showed no native American ancestry... and no real surprises.

I recently had an ancestry test, and got quite a surprise... something very interesting (and probably very heartbreaking ) happened in my paternal lineage sometime around 1700-1830...

0.5% West African, with a very high confidence level. Additional comparison with extremely distant relatives in the database backs up this result.

For the first time I wish my violently racist paternal grandfather were still alive, just so I could break the news to him - it would kill him.

I never was particularly interested in my family tree, but now I am... there is likely an interesting story 2-3 centuries ago.