“Nevertheless, within the view of the US and NATO intel agencies, Russian casualty information leaks out at every level and is collected and analyzed. The casualty assessments being publicly reported are fairly credible, based as they are on this wide scale collaboration by US and allied intel agencies.”
Since, I guess, you want me to take your word for the above, what is your name and what is your position and access level?
Otherwise, my grandmother could write the same garbage.
Wisely or not, I declined a CIA recruitment offer in college. But I know enough about the field to let you in on a secret: there are very few real secrets because, in the game of nations, everyone is working from the same playbook. And when you know the playbook, you can usually see what is happening as well as Tom Brady reads a pass defense.