Consider this...
Sox have the best offense in baseball. Tied for best in R, SLG, and 2B, lead the league in H, AVG and OPS. The yankees are 8th in R and 4th in OPS without Posada and without ARod for 3 weeks.
This will improve but the sox also are playing up to snuff offensively. The only players with conceivable declines coming up are Youk and Lowell since they have a history of fading late and Tek since he is coming off 2 pretty poor seasons. The rest are either underperforming or performing where they should be, which is quite a feat.
On the NYY side, the only player who is outperforming his typical yr is Matsui and that is mostly based on BA alone. His power to this point has been marginal. ARod is under .900OPS. Jeter is hitting .287. Giambi is hitting .230. Cano is hitting .229 and Damon is hitting .266. Couple that with the loss of Posada and the fact that Molina and Ensberg have started more games than ARod and Posada and you see why we struggled. Posada is expected back in 2 weeks and ARod is already back. Cano is back on fire and Giambi is getting on base at a high clip. This offense will rebound
On the pitching side, the sox are interesting. Their SP at right around 4 in ERA, good for 7th in the AL. They lead the league in BB and K. And their BAA is 2nd best. They also average 6IP per start. The Yankee OTOH are 12th in ERA, mostly thanks to Igawa, Hughes and Kennedy's earlier struggles. Wang, Mussina, Pettitte, and Rasner have combined to be a pretty solid, albeit unspectacular 4. But the numbers dont lie. The Yankees have allowed the second fewest BB in the AL, but have the 4th highest BAA.
The pen is where the surprise comes. The sox pen has been pretty poor this yr. The Sox have a 4.43 pen ERA, good for 11th in the AL. They have the 4th highest BAA, which is surprising for a team comprised of power arms and K specialists. They are 9th in K/9 and 8th in WHIP.
What is surprising is how well the Yankee pen is performing with Mariano, a bunch of kids and 2 old useless guys in Farns and Hawkins. Especially when you consider the yankees best MR option early on (Bruney) and their best long man (Albaladejo) are both pretty much out for the yr. The pen has the third lowest WHIP, the 5th best K/9IP, the third best K/BB, the 4th best BAA and the second best BB/9IP.
Just some interesting food for thought is all this is. The sox O is killing the ball as a unit although their individual numbers arent spectacular. The Yankees O is finally picking it up but are statistically in the bottom 3rd of the AL in runs scored. The sox rotation has been carrying the load in terms of innings and effectiveness, but they are walking the park. The Yankees rotation gets hit hard, but doesnt beat itself with walks. Also it is still evolving as its final rotation member is pitching for his job every game he starts now. The pen has been underperforming in the sox case, and in the yankees case, it has ben stellar. It all adds up to a 3 game lead in the L column over us.