[HarleyD]

I'm not a geneticist but your explanation sounds extremely basic and like something every geneticist would/should understand. I would hope that such a simple understanding would have been factored into their research.

But regardless, your explanation still leads to the same conclusion; that it is POSSIBLE for everything to have been created basically at the same time. In fact, given your explanation, you are still saying the same thing, that at some point the clock started ticking for all the species to arrive at the natural genetic drift end in order to have 90% of all species the same. If this were not so, then you would see a far greater variation from that 90% for all sorts of species.

I'm not a geneticist but I do know a bit about statistics.

[PIF]

Not sure to whom you were addressing your comment - but as a person knowing a bit about statistics ... is a sample of 100,000 valid to draw conclusions for the other 79,900,000 species? Or is that a political poll methodology?

And that whole point was a minor finding of questionable validity in a paper about mitochondrial DNA.

[BroJoeK]

HarleyD: " it is POSSIBLE for everything to have been created basically at the same time."

Of course it's possible, anything is possible, including our young-earth creationists ideas.
But modern science is based on physical evidence, and that all, without exception, points in the direction of old-earth & evolution.
For everything to have been created at the same time, our Creator would have to have left clues suggesting a much older more natural creation process.
Then we'd need to ask "why?" and no answer for that satisfies my sense of Who & What God is.