Through the api for Amazon AWS Route 53 I'm adding a new CNAME record to an existing zone. I want to test to see if the record was added correctly. 

Do I need to wait for propagation? Or since its a new record will it be grabbed immediately?

I saw an article which mentioned waiting for it to propagate but it was for creating a whole new zone; which I do not have to do since im adding it to an existing one. 

The use case is I could be adding these (CNAME Records) on the fly and need to check to make sure they were added correctly.