From what I read I would say no: The question you link talks about a TIKZ style being (mostly) ignored with groupplots, while my report is about the "/pgfplots/" path not being searched under certain conditions, giving unexpected behaviour. While both cases are about unexpected behaviour, I assume they have very different root causes (however my understanding of the inner workings of tikz is very limited.
Propably this is only a consistency issue, as I learned on tex.stackexchange xtick style={/pgfplots/major tick length=2pt} works, however to naive users like me it is unclear why extra x tick style={major tick length=2pt}, works without the /pgfplots/ path and xtick style does not.
[major tick length] does not work inside [xtick style]