An Ill Wind?

I've recently come across an interesting report which provides some analysis of wind intermittency, volatility and average load factor. It's been produced for a pressure group seeking to protect wild land so has to be taken with something of a pinch of salt but it does purport to show that average load factors are lower than sometimes claimed, and that geographical smoothing of volatility doesn't always occur. I don't have the time to undertake a reanalysis to check on the conclusions - has anyone out there done anything like this? If nothing else it reinforces my belief that development of good storage technology is paramount if we are to increase the proportion of wind on the grid.