CVC 40800 applies to "A traffic officer on duty for the exclusive or main purpose of enforcing the provisions of Division 10" of the Vehicle Code. You were told up from that the officer who issued the ticket does not have traffic law enforcement as his primary duty.

If you want to go to court and argue that you were exceeding the speed limit by an even greater margin than the officer believed, it's your right to do so - but that's not going to make the ticket go away.

Reckless driving occurs when "A person who drives a vehicle upon a highway in willful or wanton disregard for the safety of persons or property is guilty of reckless driving." It's a misdemeanor charge, so you should be considering a lawyer.