1) Goddamit, they are not "LED TVs"!! They are LCD TVs. LED="Light Emitting Diode". LCD="Liquid Crystal Display". "LED TVs" are "LCD TVs" that just use LEDs for their backlighting rather than fluorescent bulbs. This is one of the greatest examples of marketers creating new terminology that makes no sense, but getting it to stick nonetheless and using it to sell lots of product (everybody knew "plasma picture quality is better than LCD", so to sell LCD TVs they tried renaming them to "LED TVs", and holy shit, it worked!) There ARE actually LED displays, but they aren't really in mainstream TVs yet, just phones (all Samsung Galaxy S* phones have LED displays).
2) Ever since the early days of flat-panel wars, plasmas have always been preferred over LCDs by the TV snobs, so it would not be at all surprising if that cult following carries on, and their scarcity wouldn't be the only driver of that cult. In the early days, plasmas simply did have better picture quality than LCDs, and they still might, though LCDs have caught up quite a bit (with LED backlighting being one of the advances).
3) I have one of the rare HDTVs that's a CRT, bought just as HDTV was gaining traction and CRTs were giving way to flat panels. At the time it was pretty universally acknowledged that CRT picture quality was better than flat-panel technology, but that wasn't enough to prevent the size and cost advantages of flat-panel from taking over (my TV is only 34" but weighs 212 lbs.) Unfortunately I'm not aware of any significant CRT cult that has developed!