I'm not so sure why people are so surprised.
So, tonight is a victory for sanity if that means anything at all. It means that our essential analysis of the situation is correct, and should prevail on super tuesday. OH will determine the nomination.
A win in OH for Santorum over Romney means that he should get the nomination. A win by Romney means that he should get the nomination, as he'll have enough support with IL + OH, despite losing in MI with the delegate split.
Uh, no. If Santorum wins Ohio that does not mean he wins the nomination. Regardless of whether it's Romney or Santorum, Ohio will very likely be close, and the delegates awarded will, consequently, be close. This is a game of delegate numbers.
Romney is in much better position than Santorum is in for the long haul.