I enjoyed the Nolanverse Batman films a lot, but I've just run the numbers:
Bruce trained for 7 years (Alfred mentions his absence in Batman Begins) and he sulked for 8 years between Dark Knight and Dark Knight Rises. Between that, and including the short time in Dark Knight Rises in which he wore the cowl, Nolanverse Bruce was only Batman for about a year, tops (Joker's line "Let's rewind a year" tells us this).
One. F**king. Year.
"Caped Crusader" the Nolanverse Batman is not.
He is "Bat Temp".