I'm not sure how old the data in mine is. It was from before the F4U-4 was updated, but I wasn't sure of when that site was last updated either.
I'm rather sad that it looks like the Kitchen Utensils don't seem to support that program any more...
(this might not be public yet, I can't remember) but Spatula is working on an updated version....... so if it isn't out yet, I am sure it will be and will be up to date....
Or you can just use HTC's own site:
(Image removed from quote.)
Why? Performance data says the F4U-4 pilot could win without a mistake by either side. The P-38J/L vs. F4U-4 match isn't even interesting. The P-38 is out-climbed, out-turned (both in radius and rate), out-rolled, and out-run. Then there's the fantastic low speed qualities of the F4U with the flaps out. The dang UFO can hang nose up at a leisurely 60mph. 
edit: I did not post "without a mistake from either side"........
it really does not matter looking at it on paper........ anyhow what is a mere 200 to 600 ft of climb? or 25 mph faster.or 1.2 sec degree roll rate ( <---exageration guessing, without looking it all up)........ if a top tier 38 flyer flys his plane to its strengths, and the same F4U experienced flyer does the same......it will come down to the one who screws up 1st.... usually the one who gives in to the other....... thats with both of them starting out at a max speed co-alt merge.....
if both pilots are equally competent in their respective cartoon airplanes, it will come down to who screws the pooch 1st......
classic example using to average/better than avg pilots: kappa P38L vs TC F4U(although it was a D model ) 2 to 4 fights.....we broke about even....... (sidenote: not in a set environment duel, was in the old MA, before the split )
I got to add this: this happened before some players started claiming HTC tweaked the F4U to have UBERFLAPS (<---that is only a mythical misbelief )
but have seen many instances of the same outcome above
I doubt there is 15 (maybe 20) players tops that can hang on their prop at 60 kias in the F4U-4(any F4U series )
and possibly nearly the same that are capable to do it in a P38 series...... most will stall out and go into a spin whether flat, inverted or tail type spin......
but again I am only going from my experience of what I have seen or been in.....