Here is a Link showing AAA kills by Year/Ship Type/Rounds Expended-to-Kill Ratio, etc.
www.history.navy.mil/.../antiaircraft_action_summary_wwii.htm
Just an example as to how ridiculously accurate AH AA is-
This is a total from 1942 in the Pacific only for 5" Com
Rounds Fired-15,110
Kills-60
R.P.B.(Rounds Per Bird)-252
Total from later in the War (with Proxy Fuses)-
1945-
Rounds-108,516
Kills-173
R.P.B.-627
So next time someone says there is nothing wrong with ack, laugh at them and tell them to to check out this link!
Nor were the pilots in WWII, that did attack ships, anywhere near as stupid as the majority of those in AH that attack the ships. If I am in a 5 inch gun, I can pretty much clear the skys if they are 1k-2k AGL and flying for all intents and purposes straight at the boat. Also, you very rarely see a coordinated multi-plane JABO attack in AH. Get 8-10 F6Fs or P-38s or P-47 to all dive on a CV at the same time ... it will be toast and the majority of the attackers will survive.
T'was not the case in WWII ... they used steep dive angles and used multiple planes on attack. Had they dribbled in on the convoy in 1s or 2s at low altitude and shallow dive angles ... those numbers would be a lot different.
Trying to compare those types of WWII stats vs AH stats is an exercise in futility.