Yours is the first negative comment that I have ever seen regarding vertical windmills.
They are several times more efficient that traditional ones.
Vertical Windmills - Popular Mechanics
As far as tax credits on a $ 400 windmill, pppth I'll just bite the bullet.
I just commented on what was printed in the magazine. I trust that a major magazine like Popular Science is not going to print something without researching it first.
In the magazine, it states that the " The 36 inch turbine generates up to 40 kilowatt hours monthly, enough to light a 3,600 square foot home. "