Android 4.3 for the AT&T HTC One has been leaked, and yes it’s still Sense 5. The full RUU is available for download but please note running the full RUU will update the hboot version to 1.55.0000 and will prevent s-off via moonshine or revone. In case you want s-off use the clockworkmod flashable zip file along with corresponding radio.

For more details and download links head over to the original thread at rootzwiki.