Agree with the "crap shoot" when dealing with bottom paint. Travel speed, frequency of use, temperature and salinity of water, seasonal hauling, bottom prep, all will have an affect on bottom paint.
My NT32 came from the factory with a single coat of Micron CSC. Bottom was not prepped properly, and paint started flaking and chipping off after first season. Feathering chipped areas and application of light coat of CSC each season (boat hauled for Winters in New England). Moored in a brackish cove, CSC was marginally effective, mostly with slime. While CSC is considered ablative, being solvent based, it will build up over the years. For the past 6 seasons, I've been using Pettit's waterbased Hydrocoat. It's easier to apply in our cold Springs, doesn't build up as much (more ablative), cheaper and more effective against slime. With 11 seasons, at some point, I may have to sandblast the hull. We power wash the hull when hauled in the Fall. Right now, I annually orbital sand with 80 grit, feather and prime any bare spots, and roll on a light coat of Hydrocoat. This year will be different since my new slip is in a freshwater river.