Test new Endpoint Protection definitions before they are released to production

There is a KB article "Test new Endpoint Protection definitions before they are released to production", https://support.symantec.com/en_US/article.TECH246341.html , that describes how to test virus definitions before they got into production. I have three additional questions:

1. Does this KB article applies to SEP 14?

2. What is the time difference between Early Adopter Content Access defitions and Production definitions?

3. What is the difference between Early Adopter Content Access and Rapid Release definitions?

Regards,

Vladimir