I think Cheshire would have been trumpeting the fact that Nifong knew for a long time that CGM had sex around the time of the incident, and that Nifong withheld the info from the first DNA report.
My guess is that Cheshire does not want any statements to be lost. Timing is going to be important. I assume that we will see more vocal activity as we get closer to the next milestone set by the court. The exception would be the emergence of a "smoking gun" that could potentially blow the case out of the water.
Cheshire did make the point at their Friday night presser that the male genetic material found "on a vaginal swab" from a "single male source well known to the police" was new information not previously given to the defense.
Cheshire's comments about Nifong were unusually pointed and personal. I almost expected him to turn to the camera and say, "Mr. Nifong, I'll meet you at dawn. The choice of weapons is yours."