I think Christie and Rand Paul made a bit of headway, Bush and Rubio held about even, Cruz weathered a potential storm, and Carson, Fiorina and Kasich have had their swan songs.
Trump remains Trump. He needs to be put through a more vigorous testing before New Hampshire. This Iowa process has not really done enough to provide real discernment of the candidates. The results will not be that significant two or three months from now.
I think Rubio gained the most tonight. Cruz held his own. Christie continues to do well at these things. I think they all will make it through the first few primaries. The Donald hurt himself tonight by his no-show.