We don't know that we'd call it huge (we've seen it on occasion, maybe 1 in 12?), but it is likely a result of the number of new roofs that were installed (in a hurry) after Hurricane Charlie in 2004. Chases were not properly blocked, gaps were not completely sealed, etc. - it doesn't have to be a large opening for one of these critters to get through.
Typically, the WDO (wood-destroying organism, primarily termites) inspector will report droppings and further investigation is called for to resolve this issue as well as allay concerns about potential damage to electrical wiring.
Florida (particularly in the south) has a year-round "growing season" - the resulting higher populations of all wildlife is part of the equation - fruit trees are their primary food source and the typical PGI home has at least one of those somewhere on the property.
A RealtorÂ® familiar with our community will be a source of possibly more information on this topic as well as many other "little things" that more than offset this resolvable issue in your decision-making process.
Ken & Karen