Jett's complain are perfectly understandable.
We went form a TGS 2005 trailer full of awesome animations, Otacon talking via MK-II, caravans of soldiers, gekkous and tanks, the Solid Eye view, collapsing walls, Snake injecting stuff into his neck and with Kojima talking about "going natural" and travelling the world, to what can basically be described as a typical MGS game set in middle east, with souped up graphics, canned last gen animations and some new moves and tricks.
We basically went from the good intentions of the first trailer to something definetly more down-to-Earth looking. If I was not such a Kojima whore I'd be worried about the direction MGS4 is going too.
But heck, in Kojima I trust.