Lisalisa - I've done a similar thing - moved DD then age 3yr 7months from a nursery where she had firmly established playmates, to another where she's had to start again although she did and still does have DD2 (then 20 months) as company.
There's a clique of little girls at this nursery too, but slowly over the 3 and a half months she's been there, I've noticed that she's managed to ingratiate herself...tbh the reason I didn't engage in playdates was because I was certain I would've moved her back to her old nursery if she was truly unhappy.
Like your DD, mine is a fairly outoing friendly child and I think this situation, although painful for me, will only serve her better at school.
Her birthday party is in early Jan, and she's already identified more friends to invite from new nursery than the previous one, so I see that as a good sign.
My advice would be to take your lead off your DD -if she's not bothered, then she's obviously adapting well.
FWIW the mother of the child she went to play with was incredibly insensitive and I would've been white with anger.....