Thank you, LMCtech. I was unaware of this discussion.
I am not that familiar with Mark Morris' work. I posted my remarks in the Ballet In The Americas forum because I believe most folks here follow ballet first and the impact of this new work could have a large importance in the world of ballet, based on the significance of the existing ballet if nothing else. Also there is the possibility of actual ballet being danced here. This I'm not sure about yet.
Cassandra, thanks for the article you cited. It is the most recent one that I have come across and the most informative and insightful.
These are my original comments included here for completeness of this discussion.
[my "www...." added later and a spelling correction]