Hey guys,
For the friends who are waiting for their background checks... hope this information is helpful.
I requested my BG check status to CSIS back in September 21, 2017 and just received response from CSIS.
It says CSIS received BG check request from IRCC at June 29, 2017 and was completed at September 22, 2017 the result was communicated to CBSA and IRCC on the same day (September 22, 2017).
I received my DM letter on October 17, 2017.
Thus, my security check was completed in 3 months and IRCC was able to process the result in 25 Days.
Hope it gives some form of timeframe for friends who are waiting
P.S. CSIS letter comes in pretty nice format with a nice paper.... and has signature from assistant director operations lol