Interesting response. I may ask Jim about this directly and see what his take is on it. Historically, artillery is the most lethal killer on the battlefield and generally accounts for more destruction than any other single branch (although infantry, armor, and aviation don't like to admit this).
So far, the experimental scenarios I have been messing with have provided mixed results. Powerful artillery units seem to be devastating vs. support units, often times rendering these units nearly combat ineffective with several powerful attacks. With maneuver units, however, it's a different story. A mechanized infantry brigade--even one with low morale--can sustain many direct attacks without breaking, even from strong artillery forces acting in conjunction. I find that to be a questionable result as there isn't a brigade in the world--including one of our own--that we couldn't well nigh obliterate with a coordinated artillery strike from several beefy units. This assumes, of course, that you hit the unit with full force. Desert Storm provided evidence that armored maneuver units--even those dug into defensive positions--can be smashed by a massed artillery strike.
I'll have to play around with this some more before I reach any final conclusions. These are just some early observations after playing with the experimental scenario.