Technical Abstract: Homoploid hybrid speciation occurs when a stable, fertile, and reproductively isolated lineage results from hybridization between two distinct species without a change in ploidy level. Reproductive isolation between a homoploid hybrid species and its parents is generally attained via chromosomal rearrangements, ecological divergence, and/or spatial isolation from the parental species; these factors prevent the incipient hybrid species from being genetically swamped through mating with the parental species and allow it to evolve as an independent lineage (Gross & Rieseberg, 2005). Homoploid hybrid species are very useful for speciation studies because the parental (hybridizing) species are often extant, and provide a baseline against which to measure the changes that accompany the speciation process. In this issue, Brennan et al. (2011) quantify the degree of both molecular and phenotypic divergence between a hybrid species and its progenitors. The results show that molecular divergence exceeds quantitative trait divergence when the hybrid species is compared to its parents, which runs contrary to predictions. These patterns are potentially caused by a severe genetic bottleneck during the origin of the hybrid species and the geographical isolation between the hybrid species and its parents. Interestingly, little is known about how genetically divergent homoploid hybrid species are from their parental species; I provide a survey of existing data to evaluate the patterns.