While introducing JWT Director of Trendspotting Ann Mack, Social Media Insider Summit emcee Cathy Taylor asked who in the audience has used Vine -- the new 6-second video posting app. Most had. But when she asked who has produced a 6-second commercial, only one attendee said so. Incredulously, Taylor asked, “You’ve produced a commercial?” The attendee said, yes, “but it was for myself.” (Pause) “Isn’t that what Twitter is about?” Twitter narcissism aside, the notion of 6-second Vine commercials reminds me of the old Cinemax TV series "Max Headroom" -- remember that? Remember the "blipvert" commercials that ran, well, about 6-seconds?