Following the murder of four Yeshiva students in Otniel on Shabbat, December 27th, 2002, it was widely reported in the media that this came after a lull in terror attacks. The only other instance in December where a death had occurred as a result of a terror attack had occurred when Rabbi Yitzhak Arama was murdered in a drive by shooting near Katif on December 20th, 2002.
The IDF computer shows that 351 terror attacks indeed occurred during the month of December, including mortar shells, drive by shootings, roadside bombs and ambushes. Hardly a lull.