Actually something I picked up in my summer at McKinsey.
For web content, we think of "above/below the fold".
For executives/investors, the analogue is "above/below the [first screen of my blackberry | iPhone alert]".
"The inverted pyramid is a metaphor used by journalists and other writers to illustrate how information should be prioritized and structured in a text (e.g., a news report). It is a common method for writing news stories (and has adaptability to other kinds of texts, e.g., blogs and editorial columns)."
Was that a result of learning about executive summaries in your MBA program, or just something you picked up along the way?