Does water having a permanent change in the hydrogen bond angle from 104° to 114° actually have many health benefits?

As unbelievable as this seems, it is entirely true. There can be a permanent alteration of water obtained in the manner of the manipulation described for its production, in the documents you have read. There are many health benefits as well, and it is also true it need not be a 100% source of liquid intake but can be ingested as a percentage of the total water intake and be as effective. This is, in essence, a similar situation to homeopathic remedy, but it is because the water will spread, will intermix, and will be present for a considerable period on average. While water is taken in and excreted readily, it is not the same water, necessarily, that is excreted. What is ingested enters the bloodstream through absorption from the gut and then will spread through the circulatory system to all the tissues and cells and will be a part of an exchange taking place on a wide scale. To some extent, when hydrated, the body begins to excrete excess water that is ingested to maintain the balance of substances in the blood, primarily as the determining factor in causing the production of the hormonal changes needed to increase urinary output, but there will be a much longer half-life of these altered water molecules for them to be present within the tissues and cells, and work their magic, so to speak. We cannot give away the story here because it is not yours, it is for the discoverers and the proponents to study and bring forward, and so, you can build your knowledge, as well, through your questions. And this would also be a fruitful undertaking, because this is something with wide applicability, and your being a proponent will do much good. So, we are here and ready to satisfy your curiosity further, if you choose.