Stuart Elliott: It's What's "Upfront" that Counts -- Or is It?

Hard to believe, but it's that time of the year again for Madison Avenue. Time for another opening, another show. Well, actually, another 50 or so shows, staged by many of the world's biggest and best-known media owners. From this week through May 19, they're embarking on their most intense and concentrated efforts to woo advertisers and agencies.