Blogging is not Writing... or is it?

Blogging helps us keep our writing skills in shape.  It helps us raise our stake in the writing process.  We focus our minds, organize our schedule, invest in research, and engage with ideas.  We do so in a post that we may or may not publish, testing ourselves against an idea that may or may not merit a short story, a poem, a novel, or a screenplay. By this description, blogging sounds like writing with a capital W.