Username HTML Markup doesn't work with Additional Usergroups?

[Lynne]

In the Usergroup Manager for the secondary group, look at this option:

Can override primary group title/markup
Enable this option if you use this group as a member (secondary) group and you want group members to have this group's user title and username markup instead of the user title and username markup from their primary group.

I believe if you turn that an, they get an option in their User CP to have that markup be their primary markup.