The answer is probably not, but journal editors do have other motives and incentives involved than just publishing technically sound research. With the publication of two studies last week that shaped the framing of the stem cell vote in Congress, over at Framing Science, I explain the "negotiation of scientific newsworthiness" that goes on between journal editors and news organizations.
In fact, I argue that journal editors and news editors share many common imperatives, notably that they work for profit-driven organizations that need to maintain a subscriber base by generating drama, interest, and attention. Given these biases, the timing of publication at leading journals is likely to be more than just random.
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ScienceBlogling Jessica Palmer notes that editors are an overlooked, but critical component of science reporting (italics original):
So this year, super science blogger Ben Young Landis was supposed to be guest editor for Open Lab, but alas, he has gotten a new job and will be moving and will no longer be able.
The venerable Astrophysical Journal, Letters has a new editor: Prof. Fred Rasio.