As the Information Commissioner said quite unequivocally last week with respect to journalistic source privilege, the concerns are completely unfounded. The name of a confidential source is personal information under the Privacy Act and can't be disclosed now, and couldn't be disclosed if my bill passed unamended.
If that's what the concern is, I believe it to be completely unfounded. If the concern is with respect to competitive or programming activity, I think it's a little unfair for me to respond to the three-page letter after just having received it.