UPDATE, Jan. 1, 2010: This post at BizzyBlog shows that the there was recognition of likely Al Qaeda involvement in two separate press reports based on sources in a position to know on Christmas evening. Thus, the administration's delay in acknowledging that reality was actually three full days.

In their initial December 26 report ("Passengers’ Quick Action Halted Attack") on the attempted terrorist attack on Flight 253, New York Times reporters Scott Shane and Eric Lipton told readers that the "episode .... riveted the attention of President Obama on vacation in Hawaii."

In an article later that day ("Officials Point to Suspect’s Claim of Qaeda Ties in Yemen"), Lipton and Eric Schmitt reported that:

.... officials said the suspect (Umar Farouk Abdulmutallab) told them he had obtained explosive chemicals and a syringe that were sewn into his underwear from a bomb expert in Yemen associated with Al Qaeda.

The authorities have not independently corroborated the Yemen connection .... But a law enforcement official briefed on the investigation said on Saturday that the suspect’s account was “plausible,” and that he saw “no reason to discount it.”

Any reasonable person would say that this second report establishes "reason to believe that there is some linkage" between the suspect and Al Qaeda, and that a "riveted" president would have known that there was "some linkage" by Saturday night. That's why the following opener to a Washington Post item by Anne E. Kornblut dated yesterday is especially hard to take: