I read that Zero book too - great stuff. The plane did outperform ours for several years, and the basic philosophy for an interceptor turned up in the F-86, which kicked butt in the Korean War. Zero was just under-gunned - nothing like a few 50 BMGs.
There have been so many - which one are you thinking of?
I think the Zero is a good example of Japan's basic weakness. It's attributes - range, low-speed agility and climb angle - all were products of Japan not having any really modern engines (like R2800, Merlin, DB, or BMW 801). That, and they gave junior pilots waaaay too much input on design (and everybody likes a manueverable, fun-to-fly bird). Post-war writers lauded it as super fighter - as did our guys early in the war - but a clear-eyed look back shows it realy wasn't all that hot. Its early success was due to numbers, shock, and poor tactics on part of allied pilots, not technical superiority. Once we figured it out, it was doomed - even before the US put 2nd generation fighters (F6F, F4U, etc) into the fight. Even the much-maliged P-40 was, looking back, a better fighter by almost every measure except low-speed turning, climb, and range - so long as the P-40 kept his craft's strenths (training tactics tactics training) the Zero was in deep trouble - and we'd figured that out by late 1942, and word was getting round.
Then there's the Ki-61, Japan's attempt to build a competitive fighter, using the ME-109's DB engine. The Japanese were incapable of making a reliable copy of an engine the Germans turned out by the gazillion, after adapting it to Japanese manufacturing technique. Then, they couldn't train enough qualified ground crew to maintain it... and they couldn't make very many of them. At the same time, the US was coming up with... let's count 'em - P-38, P-47, F4U, F6F, P-51, all manner of bombers - all in HUGE numbers for two wars, and all better than anything the IJA/IJN put into squadron service. Japan didn't have anywhere
near the number of engineers, draftsmen, and designers to pull that off... and building a nuke from scratch was harder, I think.
Anyhow... check out Eric Bergerud's
Fire in the Sky - excellent read on the subject.
.. in the F-86, which kicked butt in the Korean War.
That's what the tell us, but the truth is more... nuanced. If you consider encounters where the US pilots (many of whom were WW2 vets, very experienced) went up against
Russain pilots flying for the North Koreans, the -86 doesn't look nearly as good.