Yes, it will help to chill faster - particularly if your ground water is pretty warm. In NC, you will likely see a big reduction in cooling time. Get a nice pre-chiller set up in a five gallon bucket, and you can fill it with ice water during the boil and have it ready to go when you hook up the main chiller.
"God forbid we should ever be twenty years without such a rebellion.... And what country can preserve its liberties, if its rulers are not warned from time to time, that this people preserve the spirit of resistance? Let them take arms.... The tree of liberty must be refreshed from time to time with the blood of patriots and tyrants." - Thomas Jefferson, in letter to William S. Smith, 1787