placeholder text has been implemented but seems to do nothing

adding this to a form in a widget/somethingForms.xml file:

<field name="description" title="${uiLabelMap.CommonDescription}" required-field="true"><text placeholder="This is placeholder text"/></field>

Does not throw a error, but when the form is displayed, no placeholder text appears.  I've checked the html code in the browser to confirm that it wasn't white placeholder text on a white background, and it does not define the placeholder property in the generated html. 

Are there any cases where placeholder text does work?  If so, it would be nice if a working example could be added somewhere (like someone in ofbiz, or maybe in the "example" plugin)

Here is a closed past issue implying that it's supposed to work now: OFBIZ-7024