They certainly don't look like it right now. I think that last loss to Lakers really affected their mentality. They just don't have the horses to match up with the Lakers(I don't think anybody does really). After these last three games I'm not sure they are going to be mentally or physically tough enough to get past a Portland/Denver/NOLA team in the first round.
It drives me nuts to see another year wasted, but I just don't see a way this Mavs team gets any further than the 2nd round. At this point I'm really wishing they would have made a trade deadline push for Carmelo or Gerald Wallace. The Mavs have hit a wall right now. Dirk will show up for the Playoffs, it's just going to be a matter of if he gets any help. Terry has been terrible of late. Roddy B is just not ready to compete against elite teams yet. Kidd is inconsistent.
I'd like to think if the Mavs had a healthy Caron Butler, it would be a different story, but I'm just not sure. They sure could use some of his toughness right about now, and I know he is working his butt off to rehab that knee.