It may have some truth for this moment in time. The campaign has not yet begun in earnest. Gilliam got a lot of publicity with his surprise win. Out of nowhere. I don’t doubt he has higher name rec today. The polls may be skewed but may just represent the past 7 days of news.
The more people get to know about Gilliam the more they will dislike him. Raising taxes in Florida isn’t going to go over very well with most voters.