No joke, I am astounded by the current precision of my PML!
I should, however, further elaborate on my previous post. Upon reflection, a more accurate statement would be that the watch has gained only about 2 seconds over a period of 5 weeks--rather than a gain of 2 seconds over 2 months that I mentioned earlier. This is not much of a difference in the big picture, but I feel like I should give full disclosure--it's just my nature as an attorney to be completely upfront (this obviously does not apply to all lawyers, but I digress...).
Anyway, when I first got the watch, I rotated the watch about 800 times--counterclockwise. (Glashutte's official website in the FAQs section mentions that if put on a winder, GO watches should be wound between 800 and 1000 times; also, most GO watches only wind when rotated CCW.) I don't have a winder so I physically rotated the watch; this gave me some time to become more acquainted with my elegant timepiece (my wife says I care for the "darn" watch more than I care for her
Also, I NEVER shake the watch to wind it.
Within the first three weeks, the watch would gain about 1 second per day. Then the gain tapered off and became squarely aligned with the seconds on time.gov. I readjusted the time at three weeks and it has only gained about 2 seconds since then, which was five weeks ago. That's the complete picture.
As you may already know, all mechanical watches need a period for the spring to adjust to the tension--especially when bought new or if it's been sitting around for a significant length of time. For a new watch, this adjustment period is about 3 to 5 weeks. So if your newly bought automatic is not so accurate in the beginning, just give it some time to find its sweet spot.
Cheers!