I think it's too early for me to get updates. Right now, NSC EB1A regular cases from November are pending on trackitt. At the present rate, I am expecting an update no earlier than 27th August and no later than September 30th. However, since NSC is putting on hold all I485 applications for EB1 from August, EB1 I140 processing could speed up.
As of now, I am planning to wait until September 30th before deciding upon PP. I just don't have enough confidence on my case to upgrade it to PP. I am applying a strategy of collecting enough achievements to prepare a strong reply, in case of an RFE in September.