I think the interactive overlays like active, weather, tv apps, game lounge, video mosaic, etc... Is a part of NDS Media Highway. They do list DirecTV as a customer of Media Highway. This dang DBSTalk iPad app isn't letting me paste the link to it, but on NDS website under media highway customers, the DirecTV logo is proudly displayed.
No NDS code in the core software / DVR, but it wouldn't surprise me that all the ITV overlays are different looking because it's part of Media Highway.
Unless a DirecTV rep themselves can come to this thread and speak up on the issue, we will never know. I only speculate from NDS corporate page and a few articles that revealed NDS and DirecTV renewing their contract together. Again sorry I can't seem to paste in this forum app on the iPad or else I'd back it up with a few references.