UK and France are ~1/3 lower. Italy and Spain are ~50% lower.
Norway is all oil, Ireland is the tax haven of the Fortune 500, Ditto Switzerland, Monaco is the tax haven of the rich, and Iceland is pure tourism.
Pulling out Iceland or Monaco and comparing them to the entire US is like pulling out Palo Alto and Seattle and comparing them to all of the EU.
UK, Germany, France, Italy, Spain, etc are a much better representation of what larger, mores diverse European economies look like.
In fact, if you take the whole EU together (as you should, the US number also includes places like the South and the Midwest), the parent comment is correct.