EIA cuts US 2020 crude production estimate to 11.76 mbpd from 12.99 mbpd
EIA lowers US oil production estimate
The US could argue that's a 10% cut but cutting because you're woefully uneconomic isn't the same as a voluntary cut.
In any case, the entire thing has turned into spin, threats and politics. I think the narrative that OPEC or Russia wants to crush shale is a false one. Shale is dead at $40 so it doesn't matter if they cut.