This is a little bit plausible. This is how the RAF shot down V-1s: http://i.dailymail.co.uk/i/pix/2011/05/08/article-1384740-0B... (picture courtesy of the Daily Fail)
So, the kill ratio of V-1s might have been higher against the RAF because it was so hard to down V-1s and doing so was hazardous. We're still talking a tiny fraction of the craft engaged, though.