That to me, is exactly what happened last night. The Celts came into that game expecting to see the same "soft" Laker squad of 2 years ago. When they realized that the Lakers were no longer that team, it was already too late. They looked shellshocked and didn't have a clue how to respond. Never in a million years did i expect to see the Lakers being tougher and more physical than the Boston Celtics. They beat us at our own game! 
This is a different LA team, and a much better LA team that we defeated in 2008. I don't know if the Celtics are better now than in 2008 or not, but I do know the match ups this time around are not nearly as favorable for the Celtics.
Two years ago, Pierce was guarding Kobe and being guarded by Vlad Radmonovich. This series he is being guarded by Ron Artest.
Kobe is being guarded by two smaller guys in Ray and TA, when last time it was PP and Posey.
Last time, KG punked Gasol and was the defensive POY. Now, Gasol is a better player than KG. The injury and grind of winning a Championship is wearing on KG. He gave us everything he had during that Championship run and it has taken a big toll on him.
Perk guarded Gasol last time, now he has Bynum. Again, advantage Lakers.
In 2008 we had Posey and House coming off the bench, both of whom stretched the floor, and forced LA to guard both wings behind the arc. Now, we sub TA who has never had a jump shot, so the Lakers can play off him and guard the post from the weakside much better, whereas two year ago, Posey killed them at times from behind the arc, as did House.
Yes, we have BBD and Sheed, but neither has an advantage. Last time, Leon had a big advantage versus their bench.
Yes, Rondo is a much better player, but Kobe is now guarding him. Ray should have an advantage on DFish, but he has to guard Kobe, who gets all the touch foul calls.
I am not saying we can't or won't find a way to win this series, but I think the Lakers have much better match ups this time around and C's have much tougher match ups than last time around.
Boston must force the Lakers to beat them with Jump shots, and not allow the penetration from Game 1. Our Bigs have to do a much better job of rebounding and getting the 50-50 balls.
We also have to do a much better job of finishing from in close, and keep Ray on the floor to stretch their D. Ray is going to have to carry a big offensive load if we have a chance to win this series.
I just don't like the match ups right now.