Monitoring Center Calls - is there "bracket creep" going on?

I just read an article in the Product Support area on "how to cancel your alarm".  One line in the article that caught my eye was that a call from montiroing would occur "30-60 seconds" after the alarm notice is received.  For many years SS has stated after 30 seconds. I inquired about what (if anything) changed when monitroing texts were first being rolled out and was advised no change in policy. Exactly what is the policy today? 30 or 60 seconds for the call to be initiated?