Do you have any kWh figures you can share with us for these 2 turbines in Montana? Here in Orkney, the owners are getting around 20-25,000 kWh per annum from their Scirocco's, with mean annual windspeeds of around 6 - 7 m/s. One customers machine we use as a reference turbine does about 24,000 kWh a year on a 6.7 m/s site (windspeed taken from the DTI / NOABL database), and thats only on a 12m tower!
We installed another customers turbine at the beginning of September, and this has produced 1559 kWh in the month, despite the last week being completely flat calm, something that is most unusual in Orkney, especially in September! That one is on a 6.0 m/s mean annual wind speed site according to DTI / NOABL, and again is on a 12 m tower