[Michael.SF.]

Yes, really. Compared to the widespread urban power needs for the United States

In your original post you used the term "exceedingly rare" now you are comparing to the total energy needs of the USA. Let's look at the numbers and some facts:

Hawaii -- 30% of the power on the Big Island comes from Geothermal
Mammoth Navy I -- Produces enough electricity for 40,000 homes.
Mammoth/Coso Junction -- 273 MW capacity
Geysers -- Supplied enough for electricity 1.8 million people
Imperial Valley -- 327 MW total at 10 plants
Steamboat, Nevada -- 40 MW at Three Plants
Utah -- 23 MW

Yes compared to the entire USA those are small numbers, but exceedingly rare as originally stated is factually incorrect and misleading. Source: Geothermal Power Plants in the USA

[Wonder Warthog]

"Yes compared to the entire USA those are small numbers, but exceedingly rare as originally stated is factually incorrect and misleading."

In my book, those "small numbers" qualify as exceedingly rare. What perspective did you THINK I had, other than relative to the entire USA??