There are outliers, but SG orders in the US seem to be roughly following this pattern. A few :03's and :04's to go and into the :05's with a few :06's now.
Based on reports from several who received them yesterday, those watches were assembled in week 17 i.e. as late as last Saturday.
Most of the activity on this forum has been :02-:06's so we might be able to infer that peak orders trailed off from :07 and later. If that's the case the current delivery rate will remain until the :07's are done.
Whether or not is gets faster for subsequent orders would depend on whether production of SG remained at the current level or was adjusted.
Off course this is all speculation.
I gave up trying to figure out how it works. I'm at :06 and 29 seconds for my confirmation email. No charges or anything yet I've seen some :07s get charged and shipping so it's got to be a combination between time/location and other variables.