Quick report on my XDs 45 - can't remember when I sent it in, but got it back a couple weeks ago, and have had two range trips since.
Springfield was nice enough to send a 7-round magazine with it. (thanks!)
With American Eagle 230gr ball, shooting from an improvised rest (my range bag) I was able to get good accuracy.
Offhand, however, it seems to be more lively - I'm having to regrip from shot to shot, which I don't remember doing before. (5-round mags) and while its possible to get rounds in the x-ring, it seems to be more difficult than before.
Perhaps I just need to re-learn how to shoot it, put some more rounds through it to smooth it out. Since I sent it in, I've been shooting a lot of revolvers (which are a completely different shooting experience), and a new Glock 21, which, with a heavier slide and bigger grip/frame, can't help but be a sweet shooter compared to the diminutive XDs.