In 1940 the same would have been true of the RAF also.
http://en.wikipedia.org/wiki/Butt_Report
"Any examination of night photographs taken during night bombing in June and July points to the following conclusions:
1. Of those aircraft recorded as attacking their target, only one in three got within 5 miles [(8 kilometres)].
2. Over the French ports, the proportion was two in three; over Germany as a whole, the proportion was one in four; over the Ruhr it was only one in ten.
3. In the full moon, the proportion was two in five; in the new moon it was only one in fifteen. ...
4. All these figures relate only to aircraft recorded as attacking the target; the proportion of the total sorties which reached within 5 miles is less than one-third. ...
The conclusion seems to follow that only about one-third of aircraft claiming to reach their target actually reached it.[4]"