My boys are not deaf but I am quick to point out all their accomplishments 
I do get what you're saying though. Moms just can't help but be proud and want to brag.
If the mother was saying something like "she's on the honour roll despite being deaf" - that's offensive but if she said "she's on the honour roll" - nothing offensive about that.
it would be far worse if kids' accomplishments are never acknowledged. My father never once said he was proud of me. If I got an "A" on a paper or a test, he would give me the same reaction as if I got a B or a C. The following school year, I didn't bother trying hard to do well in class, felt it made no difference if I did well or not, nobody seemed to care.
I would have loved it if my father bragged about me. He never did.
Although at his memorial, a lot of people came up to me and told me how much my father had bragged about me to them. And I was truly stunned for he never showed it to me or in front of me and it was so discouraging.
