Adobe Bridge - Photo Downloader and importing Sony ARW files

When I use Bridge-Photo Downloader to import Sony ARW raw files the metadata in any of my metadata templates that I try to apply are not attached to XMP sidecar files, unlike when I import Canon CR2 raw files.  I can attache metadata to my Sony ARW raw files in Bridge via Tools>Append Metadata, but sometimes it is more convenient to add the metadata during import.

Is the ability to add metadata to raw files on import a feature only available with Canon CR2 files?  Does Adobe plan to implement this capability for Sony ARW raw files?