I know this won’t rain on your parade, but the poll was taken the 6-8th. The 3-state sweep was on the 7th. The Landmark/Rosetta poll on the 9th shows Gingrich 35, Santorum 26. From what I have seen in polling from that time(in other states), that seems to be holding up in later polls by different vendors, Santorum jumped big when he showed he could take on Romney.
I won’t rain on your parade, but Santorum’s boost, especially in Georgia, is a mile wide and a quarter inch deep.