Aniway, if someone (else) is coming here for info and not conjecture:
Average reduction in miners revenue after some hour seem to be around 16 %
I got from 0.0082 to 0.0076 but I don't know if that is 16%,it looks a bit less to me but what is important is that it started to reduce a bit the mining rewards as it was expected by many.Ethereum network difficulty seems to be a bit lower from 7.79 to 7.52 P which means some miners have already switched to some other algorithm.Meanwhile the increase in price for Ethereum makes up for the small reduced mining rewards so for me nothing has really changed as of yet except that burned ETH is in about 10.000 dollars a minute in fees with this update.