CPJ had the perfect athletes to transition to the option at GT. Josh Nesbitt was a top 10 dual threat QB out of high school, and ended up playing safety in the NFL. IF you watch early season highlights of 2008, he was key factor in keeping our offense going with his improvisation. Dwyer was an elite RB, and future NFL player. CPJ said in terms of physical attributes, JD was the perfect BB. Demaryius Thomas...we all know his credentials. ON the OL, Andrew Gardner was a multi year All ACC player, and future NFL guy. Cord Howard was very good, and also saw some time in the NFL. Uzzi was a 4 star freshmen that played a lot. Nick Clayter was a 2 year player and a 4 star OL recruit. CPJ had to do some patch work on the OL, but there was talent there.
People sometimes forget this, but that 2008 defense was pretty stacked. Virtually the entire defense, outside of the LB spots, saw some time in the NFL. That defense actually carried us early in the season.
At Navy, CPJ struggled mightily his first year. They were 2-8. But the second year CPJ was able to take them to 8-5 and a bowl game. Coach Ken has kept the Navy Ship steaming full bore...ahem
Jeff Monken experienced the same thing at Army. First year 4-8, second year 2-10. But now he has Army is a very good spot.
To answer your question: How long does it take to install the option? Depends. CPJ was blessed to walk into a great situation with athletes that fit his offense and a great defense, and the results showed right away. At Navy and Army, it took a little more time.
One thing is certain: The Flex Option system is certainly a schematic advantage. Look at offensive FEI the past decade. GT and Navy are always ranked high, and Army actually surpassed both last year.