Realistically, that first definition is slightly ambiguous; it may or may not mean to imply that the talk is supposed to be promotional and not derisive in order for the definition to apply. I am guessing that they probably did mean to imply that connotation, though, based on other information on the page.

I'd argue, though, that the reality is that the word's meaning is in the process of shifting from being a synonym for "promote" to being a synonym for "make out to be"; that reflects much common usage, and dictionaries always lag behind a bit in cases like this. They have to - they're a descriptive artifact, not a prescriptive one.