Let's get real. Tebow was popular because the guy won like no one's business and succeeded at both the team ind individual levels in college with multiple Championships and the Heisman Trophy. That and because the guy actually seems like a genuine and decent human being, which sadly enough is rare these days. His issue was that his strongest skills are well-suited for college level spread offenses but don't typically cut it in the NFL where those are usually negated by the level of speed on the defensive side of the ball.
Luck's college resume thus far doesnt even sniff Tebow's. However his skill set, (big arm, accurate pocket passer, reads defense well) is far better suited for a pro style offense.