Yes. Novarossi so far I have seen standard 0.55 up to 0.7 at sea level, Picco is arround 0.5 but in several ocasions adding an extra shim is better.

All is about igmition.
Compression, nitrocontent, plug number and the weather is making the ignition timing because it is based on a self combustion. For a part the flex in the system making the gap smaller at higer revs is acting like a shifting ignition as a lot of 1:1 racing engines also use. A higher compression does shift the ignition to an earlier moment.