It depends on the quilter. I've had them done in under 2 weeks and I've waited 4 months. Was there any communication regarding what kind of turn around to expect when you sent the top to her?
I'm really fortunate as there are several LA's locally. The one that took the longest was 15 years or so ago, when there weren't as many options. That shop still offers LA, and still says that if you want it before Christmas, to get it in by August 1. Knowing up front that this is their standard timeline lets folks plan appropriately.
If nothing was said ahead of time, I'd send an email to touch base. If you have a deadline (if it's a gift, for example), let her know what that is and ask her if she will be able to get it done prior to that.