There's a reason for the hype. Luck very well might be the most NFL-ready player at his position over the past five or six drafts.
Kalil has quite the NFL bloodline. His father, Frank, played several seasons in the league and his brother, Matt, is currently a standout with the Panthers. The younger Kalil is one of the better USC linemen over the past five or six years.
Griffin has recently become everyone's darling, in part because of Cam Newton's rookie success. The idea that RG3 could be the next Newton has elevated his evaluation process.