Thank you very much for the kind reply. I was kind of asking a different thing though. I was asking about actual past OUTCOMES based on the DoS reciprocity instructions.
I am fully aware that USCIS is a department /service within DoS. However, I think there are instances where USCIS may not necessarily follow DoS guidelines, i.e. people have been denied their AOS application time and again based on early filing, even though there is a memo from the DoS clearly describing early filing up to 6-7 weeks in advance of becoming current. So it can and has happened.
I do hope you are right and that they would accept an alternative document to a birth certificate. However, at this point it is just an ASSUMPTION that USCIS will do that. Unless it can be demonstrated that they have in fact do so in the past. I agree that would be anecdotal evidence, but in this case that may be all the evidence there is . If you go back to my original post, I was also wondering if scheduling an appointment with a local USCIS office would be something to consider to help clarify the issue, so I am not just looking for anecdotal evidence to make a decision. This is what forums are for, people share both experiences and knowledge to help each other out.
Sorry for the lengthy reply and thanks again for your attempt to address my question.