Admiral Rex wrote:
^ When Kirk mentions 15 years, he is referring to the last time he saw David. This would place seeing David shortly after the 5-year mission in 2270.
Sorry, but you're conflating two separate sentences. Kirk's line was:
There's a man out there I haven't seen in fifteen years who's trying to kill me. You show me a son that'd be happy to help him.
So he was indeed saying that he hadn't seen Khan in 15 years.
Not that it's really such a big deal. People routinely round off or misremember time intervals. And for people who spend their careers traveling from planet to planet, dealing with years of different lengths, it'd be even easier to misremember the exact interval in Earth years. So I tend not to worry too much about such things. Heck, as a rule, I've found it's best not to take any numbers in Star Trek