Well, with almost 300,000 votes cast, this poll regarding who won last night is probably pretty accurate. I voted for Cruz, and I would have placed Rubio ahead of Paul...but all in all, I believe it is probably fairly accurate:
Here's the link to the Drudge Poll: http://drudgereport.com/nowlv.htm
The top four candidates are registering 90% of the vote. I believe in more scientific polls, the top four are registering something similar. IMHO, they should take an average of the intervening polls and then allow only the top four or five on stage for the next major debate.
The Drudge poll probably has less to do with, "Who won the debate?" than, "Who do you support for the nomination?"
It still bodes well for Trump, though.