In the Santa Cruz sub forum under the Tallboy 3 photos area I put up photos of my Tallboy as well as asking why/how my bike comes with SRAM hubs (says SRAM on them) when all specs online for my bike show its supposed to have Novatec's. I never really paid a lot of attention to the hub specs or brand until I started looking at a new set of 29" wheels to use occasionally on my bike, it was at the point I realized mine aren't what they are supposed to be. Based on the feedback I've seen on this forum it sounds like there have been a lot of issues with the Novatec's so It sounds like a good thing I somehow got something different than that. I'm guessing best course of action is to see if Santa Cruz themselves can explain what exactly they are...
Companies make running changes all the time. The updates often aren't changed on the online spec sheet.
I wouldn't worry about getting clarification on what hubs they are. It doesn't matter, they're just stock hubs. Wether they're Novatec, Sram, Formula, Joytec, whatever, it's a basic hub.
They're probably better than the Novatec hubs which I've been reading a lot of failures are still occurring. The Sram hubs are what they are. Ride them till they die or you decide it's time for an upgrade, then build good wheels.