I agree - 8 hours sounds about right. I've driven the I-95 route several times, also at prevailing speeds, and my rule of thumb is its about 3 hours through SC, a little over 1 hour through GA (plus a little time out for a quick pit stop), and about 3 hours through FL to Orlando (plus another pit stop before we get to Orlando). All together it adds up to about 8 hours. Travel time could vary depending on route, road construction, weather, and accidents.