The Ki-84 Type 4 Hayate (Gale) was "the most outstanding Jap Army Fighter and far ahead of the Oscar, Tony and Tojo... potentially the most dangerous Japanese army fighter plane," according to a mid-1945 U.S. AAF evaluation. http://214th.com/ww2/japan/ki-84/index.htm
The Nakajima Ki-84 Hayate (Gale) was numerically the most important fighter serving with the Japanese Army Air Force (JAAF) during the last year of the Pacific War, and was probably the best Japanese fighter aircraft to see large-scale operation during this period of the war. http://www.csd.uwo.ca/~pettypi/elevon/baugher_other/ki-84.html
http://rwebs.net/dispatch/output.asp?ArticleID=25 Grumman produced 12,272 Hellcats that accounted for approximately 5,155 Japanese aircraft shot down, while only 270 Hellcats were lost in combat. This kill ratio of 19 to one is proof that Grumman and the Navy pilots who flew the Hellcat succeeded.
http://www.vfw.org/magazine/sep97/18.shtml U.S. Air Force combat Casualties Listed in descending order War Years Killed in Action Percent of Total WWII (Europe) 1941-45 36,320 65.5% WWII (Pacific) 1941-45 16,687 29.6% Vietnam 1961-73 1,741 3.0% Korean 1950-53 1,198 2.3% WWI 1917-18 237 .42% Cold 1946-70 88 .15% Persian Gulf 1991 20 .03%