No comment, certainly not verbally

"Dutch top English proficiency ranking, but can they speak it?
...
Groningen university professor Marjolijn Verspoor told the Volkskrant she is not surprised by the Dutch high score. ‘Dutch and English are very similar, so it is easier for us,’ she said. In addition, the habit of subtitling rather than dubbing television programmes is a boost.
However, the index is based purely on testing reading and listening skills using multiple choice questions rather than the spoken or written word.
This means ‘you can’t say whether we speak better English than people in other countries,’ Verspoor pointed out.

Read more at DutchNews.nl: Dutch top English proficiency ranking, but can they speak it? www.dutchnews.nl/news/archives/2016/11/dutch-top-english-proficiency-ranking-but-can-they-speak-it/