This really depends on the particular forum being read. For instance, this would probably not work on the general forums however the bug report forums should be done this way.
Actually, most messages on the CS forums are responded to rather quickly, so it does depend somewhat on the forum and whether they have information to give.
The context of that response doesn't match what i Was responding to so I am a little confused. What I was saying in hat paragraph you quoted was that a system whereby posts are marked with "read" by blues or similar would not work on most forums such as general. CS forums are generally responded to quickly but the bug report forums do not seem to be treated as CS forums and for the most part have no blue interaction, which I think is a problem communication wise.
Part of the problem Blizzard have with forum communication is caused by strange and inconsistent treatment of the forums. "Feedback", "suggestions" and "issues" are all very different things though they can be related, however in many cases are treated the same. The idea of wanting acknowledgement over reading a thread tends to revolve around feedback and suggestions but not issues but a thread devoted to issues gets treated as the same as feedback, thus communication problems ensue.
In addition, the class forums are the most appropriate place to discuss class related mechanics and any problems or feedback however GC himself has said several times that he doesn't bother reading the class forums. Personally I find that attitude rather unprofessional and exacerbates the idea of feedback not being read, especially when the lead designer states he doesn't read them.
All I am saying is that communication issues can be kept to a minimum with good policies. Blizzard has a track record for bad policies in this area and continues to do so even now. If you want to reduce the problems in this area improvements should be made by Blizzard to do so. Nothing will ever stop some people feeling slighted but it seems rather silly to invite that behaviour through bad policy on top of that.