What do you mean by that? Can you elaborate more.
Acros can handle an absolute TON of flow. As others have said, if the flesh isn't blowing off, they're probably fine.
However, there's many many different corals that are "SPS" that cannot handle as much flow and will blow the polyps off their skeletons or simple cause them to die off. Seriatopora (birdsnest), Montiporas, Pocillopora, etc all are easier to keep than Acro's, yet don't need or do not handle "high flow" near as much as Acropora's.
SPS is a very VERY broad general classification of corals.
Most of the time people will say "I can't keep SPS alive, when they actually mean I can't keep delicate Acropora alive, and those same people will have SPS in their tank surviving just fine"