No. The Family Finder test does not currently use X-chromosome DNA (X-DNA) test results for matching purposes. The X chromosome follows a different inheritance pattern than the rest of your autosomal DNA. Therefore, it requires a different matching algorithm to be accurate and scientifically valid. However, we do show X-chromosome matching for X-DNA segments where someone is an autosomal DNA match.
The bioinformatics team is investigating the math and programming for an accurate X-chromosome program.