I would challenge that slogan - it is a partial truth.
True but not truthful.
What about August 16, 2013 - Bitcoin Core version 0.8.0 ? How do you square that with the "no transaction has EVER been blocked" ? (cap-case - emphasis by me) And yes 99.9999% is a gold-standard.
I am specifically, criticizing that using "the protocol level" qualifier is more an "ideology wish". It completely ignores the background and the factual tangential risks of blacklists and all that censorship agenda by the U.S. Office of Foreign Assets Control (OFAC) that ultimately can only agitate Bitcoin network resilience.
When I read your post my immediately though was shit - "who gives a f#ck about protocol, when building privacy tools land you in jail."
sorry - disagree big time - and clearly enough people do appreciate the viability of the WHOLE network - the ultimate expression of people-to-people inguenuity.