Here are some rough numbers at a glance:
- 60% of FTC towns have had FRC teams at one time or another
- 43% of FRC towns have had FTC teams
40% of FTC teams would seem to have no probable affiliation with any FRC teams.
Of the others that could have an affiliation I imagine that many of those in large cities are probably overly influenced by the abundence of other nearby companion FTC teams.