Something like 92% of the vote has been counted. It’s theoretically possible but unlikely for Cruz and Bush to swap places, and Rubio may displace Bush from 4th to 5th. Bush, Rubio and Cruz are close to tied for third. None of them will come away with any clear advantage over the others. Rubio is hurt due to massive underperformance. Bush and Cruz are “status quo,” doing about as well as they expected.
If you take a look at the exit polls, Trump performed across all demographics better than anyone else. A very impressive victory in NH and a strong second in Iowa give him big momentum going into SC where he already has a significant lead in the polls.