I speak as an enthusiast, not a pilot, but in answer to Dan Winterland's point about breaking from a vic, Flying Legends has been going since 1994 I believe. As a two day event with well over 20 aircraft in the Balbo each time, that makes upwards of 250 times the split had been done without incident. That suggests to me that if flown as briefed it works perfectly well.
As briefed is presumably the important bit.