Host writes vs. total NAND writes

I remembered reading 80 TBW somewhere too, but I couldn’t that find that specification anywhere on the SanDisk website for the Extreme II, and since when I sent an email to the tech support some time back I’ve been told that what matters for warranty is simply the warranty time and not any endurance rating I might have found on the internet, I assumed it was indeed the case.

Besides, realistically speaking, if an 80 TB endurance is valid for the 120 GB model, then the 240GB model which has got twice the amount of NAND should have a 160TB endurance, while the 480GB model should in turn be good for at least 320TB of Host Writes.

The P/E count usage percentage through SMART data also agrees with me. Who/what should I trust?