Holgren and Fritz Shurmur -- I think Holgren knew the WCO so well, and how to game plan the personnell in that system, that combined with Fritz Shurmur as a very good defensive coordinator, they just seemed to be able to dismantle / out coach our staff in these games.
As an example, IIRC - in one playoff game we opened with a very conservative swing pass to the full back that got blown-up, a fumble, and GB TD to start the game. The very next year, I was praying we didn't open with the same play, AND WE DID!! And they stopped it cold -- at least it wasn't blown up.
But I will agree -- they had better personnell too overall -- two big play receivers (Brooks and Freeman), versus our Rice and Stokes (and later TO), and better running backs, and a draw at TE - Jones vs Chumura (sp?). But they had Reggie White, who always seemed to come up with a key sack at the right time late in a game.