In a season that boasted such arresting musicals as The Secret Garden, Miss Saigon, and Once on this Island, we saw the Tony Award for "Best Musical" go to the bouncy, chirpy, twangy, and, at times, insipid The Will Rogers Follies. The impact, innovation, and depth of the previous three titles are underscored by the more traditional, vaudeville-pastiche of The Will Rogers Follies.Not to worry, though, as there are pleasures to be had in this often predictable Cy Coleman-Betty Comden-Adolph Green score.