I don't think so, considering a substantial proportion of their comments on this site seems to be fanboying for SpaceX in particular and anything AI in general.
I wouldnt class 'masterful' as a positive adjective personally.
EDIT: Downvotes? Not sure why. I would say Darth Vader is masterful of the force, and even that Donald Trump is masterful at being provocative. Masterful is not definitively positive or negative, it just describes being very good at something.