I attended the Tudor celebration this weekend and it was terrific!!!
There was some speculation and discussion by the panel regarding why Tudor's pieces don't seem to be performed as often as others. Some thoughts were:
It takes time for a company to learn a Tudor piece correctly. Not only are they technically difficult but they require the dancer to really become the character in the piece. This requires time and money that most companies don't have today. Someone made a comment that a Balanchine piece can be learned and performed in 2 weeks time and most require little cost in the way of costumes and scenery so they may be more appealing to some companies.
Those attending all seemed to agree that the pieces are not dated. The human element in his pieces are timeless.
Comments were made that possibly companies tend to assume that audiences are just not interested in Tudor. Poor publicity was also raised as a cause. Comment was made that the last time ABT performed a particular piece (I think it was Undertow - Dale please correct me If I'm wrong), they advertised it in the back of the brochure with a picture of a gravestone. Not very enticing to the uninitiated.
In answer to Bart's question, Sallie Wilson was unfortunately unable to attend the celebration, but if you are ever in NYC, the NYPL has video tapes of other similar panels where Sallie did talk about her experiences working with Tudor and they are well worth watching.
As an aside, I find in amusing that ABT is advertising this big revival of Judgment when it is performed regularly in New York City by NYTB. - Just my opinion.