No, you're right. They'd declare that the JS engine was just as fast (or faster) - but that didn't cover the whole of the UI, and laggy bits of the UI could sl

No, you're right. They'd declare that the JS engine was just as fast (or faster) - but that didn't cover the whole of the UI, and laggy bits of the UI could slow things down no matter how fast the JS engine was. Thankfully they now seem to have improved the whole UI.