I think that was a response to Robert Griffin III throwing 70 yards almost flat-footed!
They're both great quarterbacks, but I actually think there's more upside with RGIII. When you consider he was splitting time between track and football and is pretty much the same level as Luck (who's probably been a full-time QB since birth, given his lineage), you have to think he has more room to improve. I bet they both turn out well though; they're both smart and seem to have it together off the field. RGIII is probably the best athlete to every play the position, and I have to wonder if the Colts are reconsidering what to do with that first pick?