Yeah, my first thought was that your sponsor should have kept her mouth shut. I've had the same experience - someone I will find highly motivating has something unkind said about them, and it shatters me. Regardless of the speakers length of sobriety, whether he worked the steps, etc is not for your sponsor to judge. Certainly not aloud to her sponsee. If you feel comfortable enough, why not talk to her about how you feel? It may be something that she needs to hear.
I'm glad you shared this. Thanks.