Notice that half of those teams are from just two seasons? Some seasons the league as a whole just turns the ball over less often. 2007-08 and 2008-09 are the only two seasons in the past decade where teams averaged a turnover on less than 13.6% of offensive possessions.
Just four teams in the past decade have turned the ball over at least 20% less often than the league average (TO%+* of 120 or more). The Hawks are on pace to be the fifth.
*Calculated as 100*(Lg Avg TO%/Team TO%). Essentially ERA+ but for turnovers.
Of those other four teams, the 2001-02 (57 wins), 2002-03 (60 wins), and 2003-04 (52 wins) Mavericks led the league in offensive efficiency. The 2005-06 Pistons (64 wins) were the fourth-most efficient offense in the league.
The 2009-10 Hawks lead the league in offensive efficiency and are on pace for 60 wins.