Thanks especially to Peter Roberts, we're looking at improving how we handle X-chromosome DNA on WikiTree. XDNA matches seem to have a lot of underutilized potential.
Some time ago we enabled members to specify that they've taken an X-chromosome DNA test. Over 70 have: http://www.wikitree.com/index.php?title=Special:DNATests&id=14
I'm thinking now that most of these are just autosomal tests from 23andMe, FTDNA, or AncestryDNA. I think all three of these companies are reporting X-chromosome matches separately. Plus you could upload to GEDMatch for this.
Has anyone actually taken an X-chromosome test that isn't an autosomal test? If not, or if it's a really tiny number of people who have used obscure testing companies, we should remove this option. It just adds confusion.
Soon we can start breaking out xDNA connections for everyone who has taken an autosomal test.
Thanks in advance for any insights. I'm no expert here.