Seems to run between 0.7 and 0.9 seconds for the PX4 on my hip. Can run up to 1.8 seconds with some holsters (memo to self: get better holsters). Add reaction time and I still have a gun in my hand in 2-3 seconds.
Some of you folks may want to re-think your times. To get my closest long gun, a Beretta CX4 that I keep unloaded, into action, it takes about 22.5 seconds from sitting at my desk to dig the safe keys out of my pocket, unlock the safe, pull out the loaded 20-round magazine, insert it into the gun and chamber a round. And that's with me controlling everything - no surprise, no response time, etc. And the CX4 is with the other rifles next to my desk. I have a pretty good idea that in a real SHTF situation, my time would be 30 seconds or more.
22.5 seconds is a long time in a home invasion scenario.