I close everything before shutting down. Sometimes its 2 sec quicker but i dont know a bit disappointing especially because the osx is installed very thoroughly . maybe its the broken acpi20 sec is not so bad... Every time you shutdown? For me, sometimes it's quicker than others, it probably depends on all stuff that's still running/open, not necessarily user programs but spotlight, timemachine, other background tasks, external gear etc.
I just read that verbose is also happening while shutdown so will try that thanks for the 2 tipsBoot in verbose mode. I think you get an indication(eg lines of text) what the hack is doing when shutting down. Or check the log in console.