This rather old Q&A has gotten a rules change that changes the answer, so it has been updated. However, the rules change that is the basis for the update has "only" been announced by the Commander Advisory Group, while the answer implies that the rule is already active. I have no reason to doubt it will arrive as advertised, but as far as the Comprehensive Rules are concerned, it hasn't happened yet, and in sanctioned Commander events (or official online play), people would still have to play with the current rules.
Therefore I would suggest that using the CAG as a reliable preview source is fine, but the CR should still be the only source to describe the current state of Commander rules. I am open to discussion since Commander is a special case in the CR.