Disagree, it's
far too early to think about withdrawal. The article keeps mentioning her rapid change in fortunes, so fast the media can't keep up. That can happen again, and most likely will. In who's favour I'm not sure.
EDIT -
http://www.pollster.com/08-NH-Dem-Pres-Primary.php
If she were in Biden's place, she should pull out. Not when you're polling in second place in NH.
National numbers are a bit behind, but still respectable.
http://www.pollster.com/08-US-Dem-Pres-Primary.php
That said, I wouldn't mind if Hillary pulled out, it just wouldn't make any sense for her to do so.