He says that most gauges aren't zero loss, not that most pumps aren't zero loss. But either way, the whole idea of air loss just doesn't add up. Think of it this way. When you attach a shock pump, you thread it on a ways and it forms a seal (i.e. pump still reads zero, but the shock/pump interface is now airtight), and then you continue threading it on (those last 1-3 rotations on the threads) until the pump opens the shock's valve core and you get a reading. The whole idea of "air loss" hinges on the idea that...