I think you're wrong. Santorum is polling better in Ohio against 0 than either Gingrich or 0bamney, and Ohio is an absolutely critical swing state. This poll was also before his triple win last Tuesday.
http://dailycaller.com/2012/02/01/santorum-strongest-against-obama-in-ohio/
"Romney would lose big. Santorum would lose bigger.
Neither one is strong on anything but platitudes that serve to fig-leaf their shortcomings of record."
Again, I think you're wrong. Santorum has the strongest foreign policy credentials in the field, in dangerous times.
Further, Santorum has a lifetime 88 conservative rating, versus 90 for Gingrich - but in his last year of Senate service Santorum posted a 96. Also, unlike Gingrich, he opposed 0care, the bailouts, cap and trade, and amnesty.
"But in a couple of weeks Santorum is going to be hamburger anyway. Hes just the anti-Romney du jour."
Based on what exactly? Gingrich is an easy target for many reasons. Santorum is much more difficult, plus his principles hold up very nice compared with 0bamney.
As they used to say in Red Square, "remains to be seen."