So this "fairly common technique" can't be described in any rational way.
Par for this thread.
pj
chgo
PJ,
I'm not sure, at all, but I think they might be referring to the cue stick angle more than 'above the vertical axis'.
My cue angle changes slightly from a low draw to a high follow.
I think they probably keep their cue more on the same angle & adjust with their bridge height & distance from the CB.
Hence they would be hitting more closely toward center than I would.
Just my guess.
Regards,