Here's a hypothesis of mine, than I deathly hope becomes true, but is it possible that the Western Conference's top teams this year were so balanced, that every just assumed they were all great? Yes, on the whole, the West had the East's number yet again, but the Celtics and Pistons mightily stood out. People discount their record's because of the 52 games played against Eastern foes, but usually don't have such a good argument for why each team played so well against the West.
I know the Celtic's struggles against the Hawks and partially the Cavs make a lot of people think they were worse than their 66 wins indicates, but I think the way they're playing the Pistons, who trampled through a couple solid teams to get here, tells more that the Celtics were struggling with playing to their opponents.
I really think people are underestimating the two Eastern powers. Yes, the Lakers looked good. Very good. But what if they are at a level below Boston and Detroit, but still above the other West teams? I think it's possible. And either East team beating the Lakers in 5 or 6 will not surprise me.