I've handled operations for several projects handed over to my customers from ACN, and it's always been integration hell with zero documentation and very poor code quality. And then on top of that, the customer got rid of most of their engineering/dev staff because "it's cheaper to contract out projects and we got a great rate from them".
The majority of interactions I've been a part of have ended with either ACN leaving before the project finishes, or the customer nearly completely scrapping the ACN work and redoing it themselves. There have been successful projects, and ACN does have some heavy hitters, but they're the exception more than the rule from my first-hand experience over the last decade or so.
My point being - their association with Arthur Anderson did not harm their reputation or ability to get customers one bit. And my customers that have been burned before by them always keep reaching for them again and again and get similar results every time