Prince of Eckmühl
From observation, the arming time looks more reasonable. It's the nature of these games that the details of such operations are less than transparent. Still, using the "run 5" methodology I describe above, it appeared to take 25-30 minutes to arm ALL of an IJN carriers a/c, approximately sixty in number.
The real rub in the rest of the process is likely the "spot" portion of the equation.
For the IJN...
Aircraft had to be pushed onto an elevator, raised to deck level, pushed to their pre-designated place on the deck, started and warmed-up. Only then would the pilots emerge from below-decks to take command of their a/c from the plane-handlers and commence the take off routine. Complicating the process, would be the necessity of arming the Vals, as it was not done in the hangar (as was true with the Zeros and Kates), the practical impact of which would be to lengthen the spot-cycle of an IJN carrier launching dive-bombers. This would typically take 30 minutes, or more, for a deck-load strike (a complete VB or VT squadron of 18-21 a/c, plus 6-9 VF). Throw in a incident-free launch sequence, and you'd be looking at 40-45 minutes total, again for a deck-load launch that was part of a larger cohesive strike, the cornerstone of IJN attack doctrine.
PoE (aka ivanmoe)
Government is the opiate of the masses.