Thanks for posting that link. I read through it an thought aht the reaction to stereo there is lukewarm. Here
is a harmony central thread on the same topic. The conclusion seems to be
This topic comes up a few times a year. Do a search and you'll find more info. Pretty much boils down to 90% of people agreeing that stereo is a waste for the typical live sound at most venues
One method that is often mentioned is "dual mono". That means setting up two speakers on either side of the stage but feeding them exactly the same signal. This is mainly done for coverage reasons. Most horn-based speakers have a triangualar (as seen from the top) coverage area which doesn't map very well for a rectangular audience shape. So the basic idea is that the left speaker covers the left half of the audience and the right speaker the right half, but both speakers emit the exact same signal.
Since the Cylindrical Radiator(tm) loudspeaker has a very wide horizontal coverage area, it doesn't make much sense to run them in dual mono (why would you ?).
Hope that helps