How long do editor decisions take at Science/Nature? What does the distribution of wait times for a editor decision look like for a manuscript submitted to Science or Nature?

(You are not allowed to say "Gamma" unless you give a shape and scale parameter)
Usually they decide in less than a week after the initial submission. Either rejection or sending it out for review.
Sometimes they are more busy. For our last submission the decision took 25 days for which the editor apologized.