I do confirm it. Callier Center is a few blocks from where I used to live.
I cannot discuss things regarding Anne Geer for privacy reasons, but I do think her study is small and controlled. If you live in North Dallas, You'd see people with CIs everywhere. I bump into them at malls and places and ask them. They all come with same results- they can hear better, and carry conversation, but they still deal with same struggles and receive bad attitudes from people even before they were implanted with CIs. Getting CI for oneself is like enabling hearing people to make it worse.
They even take their CIs for a break sometimes when it becomes too much for them. Since they got CIs, they get weird dreams and hear music in the middle of the night. They may find it a hassle and have to adjust their diet to cut it down. Blame it on their auditory nerve.
In North Dallas, My hearing husband knows ASL and tutored a teen with CIs who never knew ASL in her entire life. I am told she's got it when she was a toddler. She was a client from Callier center. She depended on private tutors, because she had hard time catching up with her teachers' lectures at her school. I personally know a Dallas native guy with both CIs can carry conversation, has a job that requires interacting with others and is a volunteer at a hospital. He used to be involved with Callier Center for a while, but not anymore because Callier Center is a good friend with AGBell. He sent AGbell letters trying to convince them to be opened mind and support ASL. He is distressed. I can go on and on.
That's all I can say for that on this thread.