It's a boilerplate response that was actually drafted up by the Disney legal department for use by ALL of the Disney Boardmembers. The actual text of this email was made part of the public record (in an FCC filing) about 2 weeks ago -- with a blank space where each board member would add his/her own name.
It appears that all of the recent activity has caused a huge inflow of email to Mr. Mitchell and the other members of the Disney board. They decided to basically ignore all of the email inflow, and attempt to pacify the disgruntled shareholders with this rather lame attempt to deflect the criticisms contained in the shareholder letters.