Originally Posted by Hear Again

They sure do.

Despite the fact that I had severe-profound hearing loss for 10 years prior to receiving my first CI, I was able to score 95% for sentences in quiet and 90% for sentences in noise.

From what I've been told, if someone has been severely to profoundly deaf (or profoundly deaf) for more than 3-5 years, it will take time before they notice any significant improvement with the CI.

My results above were achieved within a year following my activation.