I'm not one to defend the MSM or Evan Thomas, but I will a little on this one.
Apparently, NewsWEAK was given behind-the-scenes access to both campaigns under the agreement that they would not publish anything about it until after the election.
Now, I have no doubt that if something crazy happened in the Bush campaign, they surely would have leaked it out through some other channel like the Internet.
When I heard him interviewed on The Today Show I heard for the first time about the agreement so I understand a little better now. You are right that if W had done something like that it would have hit the news. A few days ago Evan Thomas stated the MSM coverage/bias was worth about 15 points to Kerry. These Kerry incidents which Newsweek is free to report now did not happen in a vacuum. The other members of the MSM saw what was going on and they were not under any such agreement.