I'm not as confident in the Celtics as I had been at this time last year. This isn't because I believe the Celtics have lost a step from last year, but more so because I feel like other teams have stepped up their games. Last year the Celtics coasted to the best record in basketball and home court advantage. This year, the Celtics most likely won't be able to pass the Cavs for the top spot in the East and the Magic are nipping at their heels for the number 2 seed.
This is mostly to blame on the lengthy injuries, most notably to Kevin Garnett. Doc Rivers is wisely taking no chances with the health of his stars with the division locked up. Having KG at 100% is more important than seeding or homecourt advantage.
I think regardless of their seeding, the Celtics should get into the Eastern Conference Finals, but taking down the revitalized Cavs is a pretty tall order.