People are worried, don't confuse that with "genuine anxiety".
Regardless, the simple point remains. If you believe a claim about information to be bullshit, treat it accordingly and move on.
I don't know whether MB has or hasn't heard anything, but he's merely said that we should hear something. Hardly ground breaking, or anything to get upset or anxious about.
Re that last part. Most people have the common sense to appreciate that a source cannot be identified, or even hinted at, for reasons that should be obvious. If a forum user feels that they have a right to drill down to "assess the credibility of a source" that's a bit daft given it's bloody obvious that they won't get that information.