Earlier quoted context omitted.
Has it been effective though? The EU used to have a bigger GDP than the USA in 2008 now the USA is over 50% larger. Member nations are still dragging their feet on doing much of anything in the Draghi report and it's unclear if that will ever change.
This is a commonly cited stat but it is mostly an exchange rate phenomenon that disappears when you adjust for purchase power. If you go by comparing GDP in dollars the EU recovered almost half this gap last year simply from the dollar dropping in value.
Being the world reserve and trade currency artificially props up the value of that currency (beyond what it would otherwise be), which has the result of artificially boosting GDP to GDP comparisons.