kufman, I think the thought is they will be more durable since the stock TC3 bearings have gotten a bad rap. I'm not sure why though, myself I've had no durability issues with the wheel bearings yet. I think it is more a few cases develope and the anti-AE crowd parrots it anytime they can when denouncing the TC3.
Myself I've had more issues with the driveshaft bearings wearing fast, but I'm still learning which bearings I can run dry and which I can't, and I've discovered those need lube otherwise they seize quickly. My wheel bearings have been fine though and really don't even need much of a cleaning even after four races on carpet (12 runs.)