Could anyone from Adobe please verify the following link is up-to-date and AMS 5 Pro does not support Windows Server 2012?
That link is up to date. AMS 5 has not been tested (to Adobe's satisfaction) on Windows Server 2012. It will probably work just fine, but it will be on a non-supported OS, so keep in mind that it may be difficult to get help from Adobe if you face issues.
I'm sure they have one, but I have no idea what it is. It will probably be with a service pack relapse for AMS in the future. Adobe hasn't officially supported Windows Server 2012 in any of the enterprise applications that I have worked with, so don't feel that AMS is being excluded.
http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/products /coldfusion/pdfs/cf10/coldfusion10-support-matrix.pdf - there is Windows Server 2012 support.