Yes. Calcowgirls treatment of the "missed votes" is flawed just as the ACU"s treatment of the "missed votes" is flawed.
I think it's more accurate to assign an absent vote half a point.
If one does this, McCain's rating for 2007 comes out to about a 62% conservative rating.
See my post above. I suggested no "treatment of missed votes."
I suggested the ACU rating is flawed--period--and therefore not a rational indicator of conservatism.