SWHC reports monday (Q2 of their '09 fiscal) and the rest report in jan/feb '09 (Q4 of their '08 fiscal)
Seems to me if your thesis is correct the SWHC earnings should be a heads up on the others. The problem is how much of the Q2 is post election data and if it can be the heads up for the rest, or if you need to see the GMT (19-29 Jan is the approx report date for their Q4 '08) as the first of the relevant data.