Worked for me! Not always, once the door to baron was still closed after I opened all the crates I could find.
Used to be my best run is 11 minutes doing all 3 mini's and all the mobs in the slaughter but now can be done under 5 if you don't aggro any add at all.
Only drawback with BG afk is 15 minutes debuffand it put me at the GY by live side not the closer backdoor dead side
Also shorter run time = hitting 5 instance per hour easy.
If you were able to get to baron without any adds, you can run out there will NOT be the usual 100+ non elite adds chasing after you.