Thank you for the link. I had already read through that and it didn't explain to me specifically why certain distros are using AMD in the naming convention.
http://en.wikipedia.org/wiki/X86-64#Industry_naming_conventions
It seems to me that Linux would be more concerned about catering to users than catering to a company. In my opinion, it is confusing for users to see amd mentioned for the 64bit version of the operating system which will work on both AMD and Intel based computers.
So, my question still is, why are certain distros using AMD as their naming convention when more generic terms exist, such as x86_64?