Wow, that does sound bonkers of your SW to say that your LO will transfer the attachment immediately.
I think what you can expect, all going well, is that the baby will begin to accept care-giving from you over the course of intros. Feeding, etc. But attachment, as you rightly say, isn't an on/off switch and it will take time.
To answer your question, our DD transferred to us really quite smoothly on the face of it. She took to us well during intros, left her FC (with whom she'd been since birth, and to whom I would say she was well attached) without any apparent problem, and came home eating, sleeping and playing well. So from all of that point of view, it was an 'easy' transition.
However, now that I know her better, and looking back on photos, she was actually very stressed. And definitely wasn't 'attached' to us, of course.
Some of the signs I noticed included sitting up to take her bottle more than half the time (ie not lying back or snuggling), wouldn't let us take her hands, and was scooting off our laps down to play on the floor as soon as she could. She never had any problem with eye contact, though, so we made the most of this.
I think I really realised that things were different when a friend who is birth children said, 'oh, 8 months is such a lovely age, so many cuddles and snuggles'. And we were like, 'um, no. That never happens'.
Has your LA recommend a book called 'First Steps in Parenting the Child who hurts: Tiddlers and Toddlers'? I found it very helpful. In particular, there's a list of things to watch out for that all might not be well on the attachment front.
In terms of what we did, it was all the usual things -funnelling, sling, lots of eye contact (I spent sooooooooo long on the floor with her), parent facing pushchair, skin to skin contact, etc
The tricky thing is, though, that if you have a child who's wriggling away, it can be hard to make that stuff happen so you have to manufacture opportunities to do it. For instance, I'd imagined that we'd do our skin to skin just having nice cuddles or swanning around the house (with the curtains closed
) in the sling topless but she just wasn't having any of that to begin with. BUT she's always been very keen on her bottles and food, so we did her bottles topless, and I took to sharing pieces of fruit with her sitting on my knee, lots of eye contact, passing back and forth etc.
Five months in, she is very relaxed and seems very happy. She's got lots of age appropriate securely attached behaviours like going off crawling at playgroup and 'checking' back in with me for reassurance. She's very happy with physical contact with us and will initiate and seek lots of cuddles (and hilarious sloppy kisses). She looks for and easily accepts comfort if she hurts herself or is poorly.
It's still very much a work in progress though and I never think, 'oh now she's attached'. She went through a phase of making strange with other people (which was age-appropriate) but now is much more free and easy with others and I don't know if that's cause for concern or not. So it's something we'll always think about and work on.
Hope that helps a bit. Feel free to ask anything else.
And on the stuff you need to get in, how annoying! Ask again via the social worker but if it doesn't happen, I'd book an Internet shop slot in advance and then just order it all on the first day of intros when you know what you're getting.
And Amazon Prime is your friend.