I hope you're dipping and qt'ing these maricultured pieces. Many come in with unwanted pests like the dreaded Acropora Eating Flatworms (AEFW).
To answer you're question...they're really hit or miss. I've been able to keep a bushy yellow acropora maricultured piece which has actually colored up nicely. I almost lost it last year as it began receding from the base, but it came back.
Believe it or not, from what I've read many of them come from runoff areas in shallow lagoons where there is some more "dirty water" than many of our pristine sps tanks. If it starts to stn/rtn on you, you're best bet is to frag the healthy portion and start it at the bottom of the tank again like you're acclimating a new coral.
Good luck.