Hi, I also joined Accenture from industry as an experienced hire 4 years ago. Some experienced hires find the transition very difficult, some(like me) don't at all. I wouldn't worry too much about the performance management processes if you like the job on offer, give it your best and enjoy it. You can assess later if it is for you or not. In terms of bad reviews, ACN doesn't give references when you leave, but remember that the consulting world is small, so best to remain in good terms with people.Good luck!