I didn't say it does not contain a hello world example. However it really misses (or at least misses in some obvious place, like the first link) "a gentle introduction to haxe". For example if you go to python.org -> documentation -> there is a clear link "tutorial" with subtitle "start here". Hell, even php has a relatively easy to find "tutorial" as a first part of docs. You guys should really reorganize this in a bit more friendly way, especially that haxe is not (at least yet) an incredibly popular language with tons of tutorials all over the net.
http://haxe.org/doc/snip/hello