I'd love to see the effect that guy's talking about, because I like to consider myself a master of "breaking" long-GOP codecs, and what he's talking about is nearly IMPOSSIBLE on the 150. Maybe if you shot 1080/60i in the worst-possible circumstances, but those same circumstances will break XDCAM-EX (and I know because I've done it).
The 150 is extremely solid, and in 720/24p mode it's bulletproof.
I suspect they were shooting it in 6Mbps mode.