FCA lost credibility with me when they flooded the advertising a few years back touting a 9.6 second quarter mile for the Demon. No automotive magazines have broken the 10 second mark yet. Usually manufacturers claims are replicable.At the same time there have been MANY cases of cars making a lot MORE than advertised HP.
2003 Cobra(390 advertised vs 390WHP), the new Supra (335 advertised but usually make 390WHP easy) , Coyote Mustangs, C8 Corvettes, new 911 Carrera S (442 vs 490+WHP), just to name a few that are well known to make more than advertised. I wouldn't be surprised at all if the 3.0 is making 10%+ more power than advertised, and I don't know why everyone here is taking this so personal.
The Rubicon 392 is also likely blowing sunshine with their 13.0 second quarter mile claim. All of the publications will test one - wait and see what they end up with.