Does auto mode of flash metering have any advantage over TTL?
One advantage that I can think of is the absence of a pre-flash in the auto metering, which can make some people blink. (But I rarely use direct flash anyway, so a TTL pre-flash doesn't seem to make people blink if it's bounced. Alternatively, I can get a meter with a pre-flash, lock the flash value, and shoot without preflash.)
So is there any advantage of flash's auto mode at all over TTL, when the camera body is capable of TTL?