you may be on to something here...it's not just the fg% from 16-23 ft...look at made and attempts:

http://www.hoopdata.com/shotstats.aspx?team=%25&type=pg&posi=G&yr=2013&gp2=0&mins=20Top 6 FG % 16 - 23 ft:

Rondo / 20 games played / 57.0%

Chris Duhon / 21 games played / 57.0%

Kyle Korver / 16 games played / 55%

Danny Green / 24 games played / 53%

Courtney Lee / 23 games played / 52%

Jason Terry / 23 games played / 52%

Rondo is tied for 1st

Top 5 Made Per Game:

Rip Hamilton / 15 games played / 2.5 made per game

Kyrie Irving / 14 games played / 2.4 made per game

Stephen Curry / 23 games played / 2.4 made per game

Kobe Bryant / 25 games played / 2.0 made per game

Rondo / 20 games played / 2.0 made per game

Rondo is 5th

Top 5 Attempts Per Game:

Rip Hamilton / 15 games played / 5.5 attempts per game

Monta Ellis / 22 games played / 5.3 attempts per game

Stephen Curry / 23 games played / 5.3 attempts per game

Demar Derozen / 25 games played / 4.6 attempts per game

Jrue Holiday / 22 games played / 4.6 attempts per game

Rondo is tied for 22nd with 3.5 attempts ahead of Chris Paul, Jamal Crawford, Deron Williams and James Harden among others

Rondo is taking 2 less shots per game from 16 - 23 ft compared to Rip Hamilton at the top with 5.5 attempts per game

and here's the real kicker...

except for the top 3...rondo is taking at most one less shot per game from 16 -23 ft