the problems being mentioned on this thread are the very problems I have in believing the diagnosis of LPR is accurate in most cases.
It's an easy way for a confused ENT to get a patient out of his office though...
If it were diet related, it would be impacted by diet.
If it were reflux related, surely signs in the esophagus would correlate with reflux (which they don't in most cases)
If ppis were an effective treatment in any way for this "reflux", the effects would have to be basically as quick as they are for the treatment of GERD.
However, since the throat is sensitive, any kind of issue in the area will cause basically these symptoms. That means, you could have any of a nuraber of problems in the throat, and probably hard to detect ones.
I would favour the idea that people with these symptoms have nerve issues, a cyst, some sort of infection, a vitamin deficiency, a thyroid issue, way before I'd believe that everyone with hard to resolve throat issues has LPR. Especially after the great and infallable ppi treatment inevitably fails to resolve the issue.
If you can pinpoint exactly the area where the issue is coming from, the best thing might be to actually ask for electrical testing of the different areas of the throat. They might detect full or partial paralysis or a cyst of some kind. In the field of ENT, it seems the doctors need direction from the patient

Otherwise, one must be content with the nexium and its probably harmful effects on the (previously untroubled) digestive tract. This is the state of medicine in the 21st century I guess.