I installed my 2 packages Tuesday at 5PM EST. It is 11 AM Thursday. My Queens are still in their cage, because I am waiting to pull the cork as I had 2 hives last week abscond in 50 hours or less so I am waiting 3 to 3 1/2 days to pull the cork this time. (I'm open to comments here but not my original reason for this topic)
I just saw Bees come back loaded with Pollen (1 Bee per hive) in the few minutes I checked on them. Seems like a good sign, I can't say I recall this with last weeks Bees. The 1.1 is about an inch down in a 2qt jar.
Haven't personally done packages, but from everything I read/hear, I think your delayed release is a good idea.
As for your second point, not sure if you have a question or not....But yeah, I think that's a good sign. The limited taking of the 1:1 probably just means their getting what they want elsewhere.