No he isn't.
He was wrong about Tony Daniel on G13 and NTT.
He was wrong about James Jr showing up in the first issue of Eternal.
He was wrong about Superman and Argus, Young Justice, Nightwing and Bluebird and Batman & Carrie Kelly books.
He has been shooting blanks for awhile.
Pretty sure the Gen 13 thing was April Fools.
3 blanks doesn't really change that he's been mostly accurate.
Those are the majority of his pronouncements related to DC since the new year (aside from the Finch one whose veracity we can't determine).