The tide has finally turned and affluent consumers are gaining confidence and spending more as a result, according to Unity Marketing, which is predicting strong back-to-school and holiday shopping seasons.  The Stevens, PA-based boutique marketing consulting firm contends that things are starting to look up among the nation’s most important consumer segment—the affluent top 20%, which are by far the biggest spenders in the consumer economy, accounting for more than 40% of all consumer spending,...