We filed a K-1 Fiance Visa petition with USCIS (California Service Center) on 4/13/2017 and received the USCIS approval notice on 9/01/2017:
K-1 Visa Client Approval
USCIS Filing Date: 04/13/2017
Received I-797C Notice of Action for I-129F: 04/19/2017
Received I-129F Approval Notice: 09/01/2017
Processing time from Filing with USCIS to Approval: 135 Days
I-129F USCIS I-797 Receipt #: WAC-17-902-90790
Source: h1b now