No top 5 placement is insignificant. Every time Paul places above 6th it means he beat out one of the "front-runners". As long as he is always beating one of the front-runners, it legitimizes his continuing growth and efforts.
As for New Hampshire, Paul should do well. But, it's really wide open. I could see him getting 3rd realistically, but 4th or even 5th wouldn't shock me. I don't think that means the campaign has failed either. There are a lot of people in the country. Paul will win more votes as more people who haven't been involved in politics vote and as more supporters convert those who they talk to about politics.
5th, 4th, maybe a 3rd in Wyoming... Paul will have credibility to last him AT LEAST to Feb 5.
There needs to be a MASSIVE ad campaign in feb 5th states. I'm hoping the campaign buys Jeremiah black's ads and plasters them all over the country. They're very effective, modern, and refreshing.