Reminds me of when my team at bigcorp noticed that you got given a badge on your personal page for being quick to respond to code reviews. Cut to suddenly every code review being immediately responded to with the comment "got it, will review soon".

That said, it really did change the team's behaviour. Code reviews became a priority instead of something left to batch up and do later. Whether that was a positive change or not it's hard to imagine an edict from management achieving the same result.