9-Jun-14: Received RFE notice via text and e-mail 16-Jun-14: Received physical RFE notice for I-693 14-Jul-14: Mailed RFE response to USCIS 16-Jul-14: RFE response delivered to USCIS 17-Jul-14: USCIS website updated to reflect RFE Response Review
I think the text just said there was an update to the application and USCIS website said request for evidence. Sorry, this was from 2014, so don't exactly remember.
The updates were real-time then and I think things have changed now.