I don't think you can comment on Hansen like that. He's pitched for the Sox TWICE. I don't think you can say he's iffy and I can't say he's great. However, given his stuff he WILL be great in the future and COULD be great this year. You're right, he's supposed to have a great slider but hasn't really thrown it well yet. It doesn't make me wonder though, since he's thrown 1.6 innings.
Papelbon has been used in big spots recently and has performed more than admirably. He's developed a splitter that is hard to hit (thanks to Schilling). The best part is that I don't think that Yankees have seen either pitcher, which is the first NEW thing to happen to this rivalry for awhile (add too: Aaron Small/Wang and Cano, along with Hanley Ramirez, who won't see any time in the series... I hope)
Papelbon's September numbers:
2-0, 9.2 IP, 8 G, 7H, 2 R, 1.86 ERA, .206 BAA.