I'm curious which period you're referring to here. I haven't been following Apple presentations in detail for a while, but I remember the iPad 2 announcement was chock-full of flat-out lies. Do you mean that this is something that's changed since then (March 2011)? Or do you mean that it's not worth it for developer-focused presentations vs consumers (who would presumably be more credulous)?
EDIT w/ source: http://fortune.com/2011/03/03/steve-jobs-reality-distortion-...