You've got that right, gov_bean_ counter!
The timing of Sarah Palin's announcement, whether it's late summer, early fall, or 3 AM in the morning, is not because of any indecision or hesitancy, but instead the timing of the announcement is deliberate, planned, according to a long-range strategy to win the nomination and the election, and (I love this) will cause fifth-column LSM heads to explode.
When necessary, she does that quite well.
But as you mention, it's not her general MO.