I liked what i saw against the Celtics. The defense was active and they played with high energy. This is how they'll have to play on a consistent basis.
Remember, the Celtics are projected to be as high as the 2nd seeed in the East. I didn't see too much of a talent gap. Also, don't forget that the Nets are a work in progress. It even took the Miami Heat half a season with Lebron joining Wade and Bosh. Be patient.
Also, it's obvious JLin will have to play heavy minutes with this current roster. I say a minimum of 34 mpg. Look for Bojan to start as his outside threat and scoring is much needed.