As a huge Stevie Nicks fan myself, I'd have to say that the online group is torn half and half.
There's the group who loves Vanessa (like myself) and there is the group who does not understand what Stevie sees in this girl.
As far as the comment made above, I'd take it as positive. Heck, he critisized Stevie, (nasally voice on The One) before he said anything about Vanessa. Calling someone the underdog is not a negative comment. If anything it's something nice, in a way saying he hopes she pulls through and gets the recognition she deserves.