As someone who also (in the arts) got an O-1 I would recommend against admitting you wrote the testimonials you received yourself.
Sorry you had such trouble with yours, the people I used were fantastic and if anyone is looking to get an O-1 that's more media based let me know and I'll refer you to my attorney company, they were flawless.
I'd say that is common knowledge, changed the language a bit. Hopefully I don't need my immigration lawyers not anymore for a while, but my second one is also great!
It's a tough process and one I don't wish to do again for a while! My attorney missed the cap on my H-1B so I found a new attorney and filed for the O-1B instead, turned out much better for myself in the end but putting together an O-1 case is daunting and a full-time job in itself!
Sorry you had such trouble with yours, the people I used were fantastic and if anyone is looking to get an O-1 that's more media based let me know and I'll refer you to my attorney company, they were flawless.