You'll have to scroll down past Matt Schaub, but Steve Palazzolo's article on QB Pressure Profiles for the AFC South has a good breakdown of Andrew Luck's ability to avoid pressure.
Though it’s difficult to draw conclusions from one season of data, Luck struggled most with pressure from right tackle. So, the free agent addition of RT Gosder Cherilus could go a long way toward ensuring his improvement in Year 2.
Interestingly, the only other AFC South QB with the same strength and weakness (from a statistical standpoint) is Chad Henne. We can give Luck some slack for being a rookie and having a porous offensive line last year, but he definitely has room to grow - from a statistical standpoint.
On a side note, apparently Blaine Gabbert's strength is "none".