Regarding the quote. I'm not cryptographer, but Andersen said that this quote does not really make sense from the cryptographic point of view, and rather proves that Satoshi was not a cryptographer and had only high level knowledge of cryptography. Real cryptographers would never say something like this
Source:
https://www.youtube.com/watch?v=rQ3e1Pzu7iI&feature=youtu.be&t=748So not sure if this is really a quote that Monero want to use this quote from Satoshi, as apparently it has no sense.
Indeed, to Gavin credit he doesn't say this quote does not make sense, but that this is the 101 of crypto. My understanding is that Gavin refers to the vague "informal" formulation in the quote, not to the meaning of it. The conclusion of Gavin just based on this poor formulation is really stretched though. The quote was actually a forum post so of course it's not formulated as a science paper.
Worth mentioning that the post of Satoshi with that quote also mentions stealth addresses. In a way, all Monero is in there
https://bitcointalk.org/index.php?topic=770.msg9074#msg9074I am almost certain satoshi will not come back to comment. However I think the chances that satoshi is following Monero development are much higher.