"if the contents of the letter have any traction we will hear of it in the MSM during the next days or weeks" - you can't be serious. The media (including the controlling shareholder of the G&M) are supporters of the "no diplomatic reset with Russia" policy.

Note that the authors of the letter signed their names to it and clearly identfied their technical experts, something that the anonymous leakers to the Washington Post and NYT never did.