Shouldn't the title be, "Another success story for Haxe"? I thought the massive success of Lucas Pope's "Papers, Please" is validation enough of the framework: http://en.wikipedia.org/wiki/Papers,_Please
(at least it was for me...I was amazed at how fast Pope built and ported a cross-platform game considering he's a one-man shop...though to be fair, he was also able to learn Flash and build games for Ludum Dare competitions...so he's probably an outlier :) )