Of course, this 10 hours a day Admin 'Guru' refers to consists of 1/2 an hour each for morning and afternoon tea, an hour for lunch, ducking off to the gym for an hour and a quarter, going to the bank and the post office, punctuated by long bursts of swanning around to all your mates' offices drinking cups of tea and coffee and calling it 'liaison'.
After all that, no wonder he or she is feeling a bit knackered.