Thanks for the citation. Excerpt from the article:
"That is 1681 per day. 84% of this tapping concerned mobile phones. Compare this with the news that there were 2208 taps in the United States in the whole of 2007."
It's comparing like to like. Neither numbers include intelligence-related surveillance, only domestic criminal law enforcement. The Dutch are wiretap-happy and the U.S., thanks to Title III, is relatively restrained.