Bob,
Not arguing, just discussing. You have to stay pretty far south until mid April at least.
The teams used to run Pomona and Phoenix then off to Gainesville. Then we would work back across hitting Atlanta, and Houston on the way to Las Vegas. We no longer have Atlanta and Houston, so what would you do?
Going to Pomona, Phoenix, Gainesville then back to Vegas makes no logistical sense. Would you run three out west before Gainesville? And with all the teams now testing in Florida, they would be driving across the country another time.
And, starting after NFL is over, will get us more eyeballs both at the track and on TV.
Alan