I can't work out if this is just a comment on the lack of responses, a response to the original question, or just tongue-in-cheek wittiness.
Looking at Genome, he appears to have written 7 plays (I may be wrong and have missed something). As I said before At The Gate, The Anomaly, The English Department and Will You Accept the Call? all exist, and so does Falling (from Just Before Midnight). The only two I don't think exist are A Game of Tombola and The Daytrip. 5 out of 7, or over 70%, seems to me to be a a very good survival rate.