What? How is that what you took from that?
I'm saying things would probably even out over a larger sample. Odds are very low that they'd go 3-16 against the Yankees, because the Yankees...aren't that good.
You're the one that said it was luck and going 1-5 vs. them was a fluke. How? Did they lose each of the five on a bizarre bounce, random unexpected play? No. They've lost plenty of games this year through bad fielding, or baserunning, or other fundamental issues. They've gotten away with it since they've played the second easiest schedule in the league.
They're below .500 vs. winning teams. Another fun stat is their record in 1-run games: 15-24, so they have problems winning those tight games that are common in the playoffs. They're also the only division leader (and only potential playoff team other than Philly) with a losing record on the road, yet they're "coasting" and making little effort to secure any home field advantage, which may be critical in a series vs. Houston.
I truly believe the Sox are very good, but I have legit doubts as to how far they'll go in October. As I said above though, baseball usually takes the stats and throws them out the window in a short series.