Hasn't AnonyMint proved that Monero is not truly anonymous, certainly not to a "killer attribute" level? I've seen him tear it apart in a thread on here, and stayed away for that reason.
He proved that it is truly anonymous, in that he agrees that transactions are both cryptographically untraceable and unlinkable. He thinks that our decision to use i2p as a low-latency mixnet to disguise traffic is no going to prevent a determined attacker with lots of resources from ascertaining whether an individual (as in an IP address) is using Monero, but on that point we disagree. That notwithstanding, he does not fault the cryptography or the implementation behind Monero's transactional and address privacy.
AnonyMint's requirement for full anonymity is such that you cannot, even if you wanted (or under threat), provide any information on your own transactions, that would link you to the recipient or sender.
He thinks Monero is not fulfilling that.
Another highly respected contributor has said that NSA can mess with Monero but nobody else cannot, and this makes it an excellent vehicle for private transactions by parties who cooperate with government (such as corporations).