Seriously, it's like a bad joke. I'm trying not to blame anybody, but this is just plain incompetence on everybody's part, HTC, MS, carriers included.
Recently I have had a somewhat lengthy correspondence with my mobile service provider in my country where I asked them when WP8.1 is going to be officially released. They told me that it is "in progress", but they asked my patience and told me they'd get back to me with a more specific answer. They got back, and told me that WP8.1 is not going to be available for the 8S. I told them that it's really interesting, since I've had the DevPreview since April, and asked them whether there is some technical limitation for their not releasing the update, since WP8 doesn't enable 8S users to put downloads and applications on the SD card, which, with its tiny 4 GB internal storage renders the device pretty much useless. They answered by saying that that is all the information they got for me and they appreciate my patience.