Source: The University of Florida;:
“A single individual of the Formosan subterranean termite does not consume more wood than a single native subterranean termite, however, because of its large population size, a Formosan subterranean termite colony can cause more structural damage in a shorter time.”
“A single colony of Formosan subterranean termite may contain several million termites (versus several hundred thousand termites for native subterranean termite species)”
http://entnemdept.ufl.edu/creatures/urban/termites/formosan_termite.htm