Beware of one tree!

Sometimes in the comments of this weblog people get into heated disagreements about one figure and its proper interpretation. I don't get much involved most of the time because different visualization techniques often differ on the margin, so getting obsessed with minor details is a fool's errand. For example, in the paper I reviewed below there was a neighbor-joining phylogenetic tree. Take a look. The length of the branches are proportional to genetic distance.