It may be that they haven't done any noise testing at this stage (and the IEC 61400-11 standard for wind turbine noise testing is really not applicable to the AWT configuration) but they would have been better off just saying something like "we'll get back to you on that" rather than setting up expectations that might turn out to be unrealistic.
Still, the fact that they've got it working once doesn't mean the problem is solved. You need it to work all the time, in all sorts of weather conditions, and automatically stow itself if conditions become unsafe. Failure means plowing into the ground, which is probably going to be expensive each time it happens.
I'm sure they'll never get the plow-into-the-ground rate down to zero, but there's gotta be a lot of work still to be done to get it as small as possible.