With the release of iOS7 recently, Embarcadero have released a hotfix for XE5, which includes styling for iOS7 for Firemonkey UI controls, and support to be able to change the styling in the IDE. I was quick to grab the hotfix, and give it a whirl on iNews. On the down side, it appears that the styling for TListBoxGroupHeader is not working properly. On the up side, I was able to change those items to instances of ordinary TListBoxItem and use the listboxitemlabel StyleLookup. The following is the result for the new Settings page:

..and the groups list: