Wow, this thread is out of control. I use my tablet all day long ... If I had to shut it down after each use I would probably go through the process about 200 times daily and Yes the tablet does take time to shutdown. Thanks god I only shutdown/reboot when I update my SuperSU to make it part of the system files otherwise I would throw it out the window or shoot myself. But since a tablet is meant to stay on Sleep/StandBy, Im not sure Sony would consider this a bug ... If it is, then I have to agree ... at least to me ... irrelevant but I feel for the guy that needs to wait 60 secs everytime he shuts it down after a single use.
Not judging but do you shut down your phone after each call you make? They are the same types of devices.