Pretty much. ES6+ scores are from running compat-table's test suite (https://compat-table.github.io/compat-table/es6/ https://compat-table.github.io/compat-tabl

Pretty much. ES6+ scores are from running compat-table's test suite (https://compat-table.github.io/compat-table/es6/ https://compat-table.github.io/compat-table/es6/), along with their weighting. If you click on an engine's name to go to a page about it, there's a report at the bottom with failing tests.