The most amazing stat regarding Luck's start is that he's 3rd in the league (behind Brees & Eli) in yards per game yet he is 32nd in percentage of yards which occured after the catch. He's not throwing a simple 4 yard slant and having guys run 75 yards after the catch.
His receivers, other than Reggie Wayne, are not getting open. At all. He's having to throw guys open. And he's succeeding. Truly remarkable.