Announced here http://forums.familytreedna.com/showthread.php?p=375519 and on FTDNA’s Facebook page, https://www.facebook.com/FamilyTreeDNA. You have to join FTDNA’s forums to read the article, but three bloggers (as of when I posted) have done a great job of explaining it and you can read their blogs without having to subscribe. You may need to clear cache if you run into problems.
Roberta’s article – http://dna-explained.com/2014/01/02/x-chromosome-matching-at-family-tree-dna.
I ran the matching and only have two matches out of Family Finder’s 390 matches. I only have X Chromosome information from my mother so I was not expecting a lot of matches. My mtDNA haplogroup is C1b and I only have a handful under mtDNA matching.
The first match listed a number of French Canadian locations and those are in line with the Acadian ancestry on one of my maternal grandmother’s family lines. Both matches weren’t new, but they were so far down the list I hadn’t reached them yet. Using the Sort by Shared cM method, the first one was on page 21 and the second one was on page 33.
Here’s the chromosome comparison.
The segments are not very long with match 1’s longest segment at 12.79 cM on Chromosome 10 and match 2’s longest at 8.73 on Chromosome 6 with a second Chromosome 6 match of 1.42 cM.