Greetings from Quantico, Virginia, USA: the "Crossroads of the Corps". It's not surprising that US Army soldiers, Regular or Reserve, are unfamiliar with the phrases "Three Block War" and "Strategic Corporal". They are US Marine Corps, not Army, terms, and we're not in charge...yet! Having said that, I would expect that our more experienced soldiers ( as opposed to always-capitalized "Marines") would instantly understand the ideas behind the phrases.
I do think that both phrases should be understood as superb "bumper stickers". They communicate broad ideas exceptionally well, but aren't intended to provide rigorous detail. I agree that the idea of simultaneity gets a little lost, even though Gen Krulak described the concept in terms of "one moment" to the next, not as distinct operations or even phases of an op. These days, we're definitely thinking about all three blocks requiring simultaneous consideration as we try and develop future capabilities.
Anyway, no cultural imperialism here. I came across this thread as I was reading the Australian Army's draft Future Land Operational Concept on "Complex Warfighting", and one of the hottest emails here around Quantico at the Marine Corps Combat Development Command is the speech given this winter by JOHN RALSTON SAUL to the faculty and cadets at RMC, available here for those who haven't read it: http://www.gg.ca/media/doc.asp?lang=e&DocID=4295 . We'll take good ideas anywhere we can find 'em, and you're welcome to the "Three Block War" if you think it's useful.
Semper Fidelis
Rich Webster