NBA.com doesn't break down its stats on a four-game basis, but their five game breakdown indicates the Nets have been winning because of their passing and rebounding...not to mention scoring.
Over the past five games--four wins and an overtime loss--the Nets are tops in the NBA in assists (27.2) and rebounds (49.0), second only to the Knicks in scoring (110.5) and third in blocks (6.8). They're also 10th in shooting overall (47.8%) and 14th in three point shooting (37%). One place where they are way behind is steals. They are worst in the NBA.