"maybe more so than some company that "estimates" your origin based on your matches in their database."

It seems to me that you can not "estimate" an origin. Either you're a match or you're not. All the four test results within my family were 100% matches.

"Why? Because you can take that data and compare it to published data and other databases elsewhere to find even more matches than one company can tell you about."

Who says published data is not "estimated" as well? Is published data not susceptible to human errors? And what if your halotype does not match any published data? Then what?

Mel