I learned programming & CS at age 18 and I'm on par with people I met who learned it at say 11.
I learned English starting at age 5 (I read as almost fluently in English as in my mother tongue, Russian); I learned Hebrew starting at age 10 (I have a hideous accent and prefer to read in other languages); and I tried French in university at age 20 (it was the only time I had to take private lessons to pass the exam).
I'm not sure CS/programming are that much like foreign languages.
I learned English starting at age 5 (I read as almost fluently in English as in my mother tongue, Russian); I learned Hebrew starting at age 10 (I have a hideous accent and prefer to read in other languages); and I tried French in university at age 20 (it was the only time I had to take private lessons to pass the exam).
I'm not sure CS/programming are that much like foreign languages.