When I got my 67-marker test back I had 0 that were 67/67. I had one that was 66/67. Luckily we both had very good Genealogies. My 7th g gf was his 6th g gf's brother. Yesh! MRCA - like 9 generations! However, I had a 65/67, and our MRCA was 6 generations. So, it isn't always the case that the farther the distance, the further back in time you are related. Maybe that's the tendency, but it's not always true. Part of that is they are dealing with mutation estimates. So, if a gene doesn't mutate at the rate accounted for by the estimate, it will through things off.