In my case, there was no change on USCIS after receiving clock stopper message for several days until my new employer and Lawyer did not receive any update until they received a mail for RFE. ( In my case, my new employer and Lawyer did not receive any update until they received a mail for RFE).
However, the status was changed from Initial Review to approval in 3 hours after I received the clock stopped message
I guess if you did not see the status change from Initial review to approval in couple of hours, most likely you will get RFE.