It may be true, but until they can predict the weather (well, general climate trends, not necessarily weather) 6 weeks in advance on a regular basis, any correct prediction is still little more than luck. I bet they don't issue press releases every time their 6 week outlook is incorrect!
It's like when the MO issue their long-range forecasts, which are always along the lines of "changeable, with colder wetter conditions in the north west, and drier warmer conditions in the south east". Really? Wow! Who'd have thought! I genuinely don't see the point of these being issued to the public, as they are so vague they are worthless.
Liam