I believe I indicated at the time I was not 100% certain, nevertheless I was wrong about the Fed holding the majority of the Federal debt. Here are the correct numbers and unlike you, I provide a source:
We found that as of September 29, 2010, the Federal Reserve held 966 billion dollars of the U.S. national debt in the form of U.S. Treasury Securities or Federal Agency Debt Securities, which represents 16.9% of all U.S. individual or institutional debt holdings, or approximately 7.1% of the total national debt.
As for the Treasury actually doing the printing of money rather than the fed, I would call that a distinction without a difference.
Quantitative easing (QE) is an unconventional[1][2] monetary policy used by central banks to stimulate the national economy when conventional monetary policy has become ineffective. A central bank implements quantitative easing by purchasing financial assets from banks and other private sector businesses with new electronically created money.