Yeah, it looks like the slant six's performance status as a too-well kept secret will endure. It's like pulling teeth to get people to realize that these leaning towers of power have a Jeckyl/Hyde personality disorder when treated to even moderate amounts of boost.
They are arguably the strongest basic engine Ma Mopar ever built, and have all sorts of advantages when given the right treatment at the hands of a knowlegable tuner.
But, the great bulk of the Mopar fans out there will go to their graves not realizing the potential these engines possess.