@Veqryn:
Your numbers on the Aircraft carriers are inaccurate.
At the outset right before Pearl Harbor, America had 8 Fleet Carriers (1 in atlantic) and 11+ Escort Carriers (some in atl), and by Axis high water mark in 1942 (before midway?), had 6 Fleet Carriers (1 in Atlantic) 21+ Escort Carriers (some in atl) and 23+ more Fleet Carriers under construction.
That’s a lot of info there! Where was it sourced?
I must say though that for the US carrier figures I’m here quoting more than three sources (one wiki), but also Eagle Against the Sun (Spector, 1985) and The Oxford Companion to WWII (articles ‘Pearl Harbour’ & ‘Pacific War’) and web info.
I think it is undeniable that the Japanese had a naval advantage in 1941 - that was one of the important considerations, the US was planning to expand their navy massively leaving Japan in the shade with or without war.
It is also important to remeber that a lot of the carriers were built on the hulls of older broad beam vessels like oilers. For instance - the Sangamon Class were oilers built before pearl harbour but converted to carriers afterwards (operational ‘late 1942’).
Another aspect to note is that many of the Bogue carriers (including Atlantic ones) were laid down in Spring/Summer 1941, (prior to Pearl) but then launched Spring 1942 (after Pearl) and many only commissioned into service by Autumn 1942. I know next to nothing about naval engineering (correction: I know NOTHING about naval engineering!) but it doesn’t surprise me that uphostering, arming, crewing and dispatching an aircraft carrier is a lenghty process - even when under pressure.
Because of this - I’m pretty sure that Japan confidently was facing just the 3 carriers in 1941. It is mistakenly assumed that had her surprise attack been discovered Japan’s carriers would have turned back. However, according to Spector who used Japanese navy archived material their orders were to destroy the Pearl Harbour based battleships and carriers even if they had to fight their way in (the task force had a hefty escort group consisting of 2 battleships, 2 heavy cruisers, 1 light cruiser, 9 destroyers, and 23 fleet submarines). Would they really have been that confident had the Americans been fielding 10+ aircraft carriers?
As far as I can ascertain there were 3 carriers in the Pacific on 7th December 1941:
The USS Lexington was transporting planes to Midway.
The USS Saratoga was in harbour at San Diego.
The USS Enterprise was returning to Pearl after delivering aircraft to Wake Island.
The USS Hornet (famed for the Doolittle raid) was in Norfolk, Virginia on the Atlantic seaboard.
Similarly ships like the Yorktown and Wasp were only sent to the pacific to plug holes in carrier fleet (Yorktown straight away, Wasp after Midway).
References:
List of pre WWII US aircraft carriers
http://www.hazegray.org/navhist/carriers/us_prewa.htm#cv1
Location of Hornet outside Pacific Theatre in 1941
http://en.wikipedia.org/wiki/USS_Hornet_(CV-8)
Sangamon class - the oiler/carrier issue
http://www.hazegray.org/navhist/carriers/us_esc3.htm#sang-cl
Bogue class - the laid down/launched/commissioned date issue
http://www.hazegray.org/navhist/carriers/us_esc1.htm#cve9
USS Wasp
http://en.wikipedia.org/wiki/USS_Wasp_(CV-7)
http://www.history.navy.mil/danfs/w3/wasp-viii.htm
Books for general figures
The Oxford Companion to World War II, General Editor: I. C. B. Dear; Consultant Editor: M. R. D. Foot (1995).
Eagle Against the Sun: The American War against Japan, Ronald Spector (1985).
Websites:
World Aircraft Carrier Lists: http://www.hazegray.org/navhist/carriers/
Dictionary of American Fighting Naval Ships: http://www.history.navy.mil/danfs/index.html