Oh, right, there is a difference. I forgot. In file system templates it should actually still work.
Or rather: in Zope 3 templates it should work, in Zope 2 templates not.
This means: in browser views, viewlets, and portlets you can use this. In skin templates, templates in portal_skins/custom, portal_view_customizations and templates in for example PloneFormGen overrides you cannot use this.