If the article had been retracted I'm sure there would have been a response from the band.
If the tapes proved Dan was mis-quoted I'm sure there would have been a response from the band.
I can only assume what was in the article was accurate.
It's a shame that after all the false bravado about how other bands should have handled similar situations (Creed comes to mind) Anthrax didn't do anything, esp. considering the severity of Dan's accusations.