In episode 146 of the weekly Hump Day Hangouts by Semantic Mastery, one viewer asked for the team's opinion on using data highlighter from Google Webmaster Tools to improve search appearance.
The exact question was:
Hey guys, what do you guys think of using Data Highlighter from Google Webmaster Tools to improve search appearance? I currently use the Project Supremacy plugin for all schema-related tasks, but it's missing article schema which the Highlighter has. Or is Article schema not in the plugin because it's useless?