what a bunch of crap ! Hobbs time is just as accurate as 'watch time' especially when you go to add up the time you have at the end of the 24 months, and you keep making mistakes !
so what if the odd minute here or there is incorrectly logged...it'll even out ? Do pilots loggin instrument time have a 'cloud timer' to log time in actual IMC ? Thought not ! At the end of the day if I time myself using my wrist watch and I log take off at 'about 12:30' and landing at '14:32', then I'm sure errors are going to creep in, more so than using a Hobbs. Besides, my theory is that as soon as the engine is started, then the PIC is IC of the AC!!