When the 1st generation of Shimano SIS was installed on
the same frames that our team raced in the previous season "ghost shifting" was
exorcised.
All of the BS about "I'm
so strong I flex this noodle frame" was just that, a classic of example of barking up the wrong tree reinforced by confirmation bias, myth and unwarranted vanity.
Bob Roll agrees:
With DT SIS a simple push/pull on the lever "click" and the required cog was reliably engaged and
stayed that way until another cog was selected, even on my Vitus 979. 6, 7 or 10 cogs the design just works, if the frame is straight, the hanger aligned and simple minimal maintenance is done.
Stand when you feel like it, it's good technique for getting up and over, accelerating, stretching and just using a different muscle group to ease fatigue.
-Bandera