There are many more media reports now that the test has come to an end this week. Oddly enough, this one quotes Welt am Sonntag, as did Wimpie's English language article. But the German version has far higher failure rates.
http://www.rtl.de/cms/news/rtl-aktue...17-821756.html
My translations and comments again in italics.
Körperscanner: Ständig Fehlalarm
Body scanner: Constant false alarms
Der umstrittene Körperscanner ist offenbar bei dem Praxistest auf dem Hamburger Flugahfen durchgefallen. Er soll ständige Fehlalarme verursacht haben.
The controversial bodyscanner has flunked the test at HAM. It gave constant false alarms.
According to reports from 'Welt am Sonntag' internal dcouments showed a current alarm rate of 70 percent.
The article goes on to say that results will be analyzed in the coming weeks and that there will be many discussions including legal, political, and financial. According to the federal police tests should only continue if adjustments are made to reduce the high failure rate through improved equipment.
Pretty much every major source I have checked quotes the 70 percent rate, which may possibly have been lowered from the earlier 85-95 percent rate with the 'improved' technology in place since the test was extended a few months ago.