I have a close friend who used to work in wind energy. I saw this thread pop up and asked his opinions on wind energy as a whole and thought I'd share with you guys. Keep in mind I have basically no knowledge on the subject so I'll be paraphrasing his words. Also, this isn't to push any sort of political view and as he's been out of wind energy for ~3 or so years some of the info he gave me could be out of date. Here goes...
-Wind energy is very inefficient. Somewhere around 30%. Where it's at right now (or at least ~3 years ago) is more of a starting point than an indicator of its ability.
-By the time a turbine pays for itself the generator needs to be replaced which is the most expensive part of the turbine.
-They're working on pretty much eliminating the need for a generator to power the blades once they start. He said once this happens wind energy will be comparable to fossil fuels as far as effiency, all while cutting down on maintenance costs and of course being way cleaner than fossil fuels. They just need to figure out the technology.
-A regular work week was ~100 hours if they were on schedule and ~120 if they were behind. 18 hour workdays with with Sundays of if they were on schedule. One of the guys who worked there put in ~140 hours in week. That's nuts. Climbing a turbine on average took 30 minutes give or take.
I realize a lot of this isn't pertinent to the conversation at hand, but I just thought I'd share.
Efficiency is something of a red herring when it comes to a power source that requires no fuel. Sure, you'd get more power from the same wind turbine if it had higher efficiencies, but it doesn't change the operational cost.
The discussion of work hours strikes me as a problem with the company he worked for. If your employees are normally working 100 hour weeks, then you need 2.5 times more employees. And if they have surge work that can go up to 140 hours per week, then having more employees makes even more sense.