It depends with the volume of open reports that are currently open, at the moment it's usually within 1-3 days.
Also, just to get something out of the way;
It depends, they're fast if they don't get many reports, but they always get 1000+ reports a day. Just wait for your report to be dealt with.
It is around 180-320 reports that are created each day at the moment, Sentinel has been stealing a load of report of you guys, they have drastically dropped since the implementation of Sentinel, and majority of reports are chat related or teaming ones.
If you have any questions, concerns or comments, feel free to PM me ^-^
-Locked as like a load of people have given you the same answer/experience and it has been answered