Very much so. We need someone in there who understands what is happening in the decay of our country and has the will to reverse as much as he could. It's not just about positions, it's about passion and vigor. Santorum could be that candidate if the addicted-to-RINO establishment doesn't tear him apart like last time.
How is Rick Santorum a true Republican (a fake distinction, obviously) yet Mitt Romney is a "RINO"?
Mitt Romney has been a moderate, then a conservative, and claimed, at one time, that he was an independent. He became a "conservative" around the time he decided he wanted to be President and knew what it would require to be appealing to the GOP base. It's unfair to call Romney a RINO, but he's had to make far more concessions to his home state than Santorum has ever had to.
Santorum's always been a Republican, always been pro-life, always been socially conservative, always been generally conservative, with some concessions to being from PA. He's not a "movement" conservative, but he's conservative enough to have risen to the Senate GOP leadership at one point. Until 2012, no one viewed Santorum as a RINO, and the only reason people did is because he backed Arlen Specter in the 2004 Senate Primary, saying "politics is a team sport". (He's not wrong there, by the way.)
