I wouldn't be sure that this is authentic, i.e. actually from John Nagle.
It is odd that some people give more credence to a pseudonym, or in this case a company name, than to using one's own name.
And if someone thinks a pseudonym is a particular famous person, they must have a reason, which is unlikely to be weaker than just assuming a normal name is accurate.
I'm not up to doing a Bayesian analysis right now, but I feel like one could show it makes more sense to doubt an unverified name.