This feature has been added (https://www.warzone.com/blog/index.php/2015/01/update-3-4-banking-boot-clock/
) but the link to enable/desable it has been removed from the settings page. Here's the link to the setting: https://www.warlight.net/ChangeShowPlayerBank
(found in https://www.warzone.com/Forum/71913-bank-time-display
In Flash, this feature is disabled by default, however; in Unity the banked time for each player is always shown.