You didn't answer how old they are but after only three days of 12/12 I'm betting none of them are showing sex yet. At the beginning of male flowers they look like a little ball on a stick. I've also found that if you see the green growth of a sex organ and there is NO hair(s) after 2 or 3 days it's more than likely a male. I've noticed a fem's little pistil will appear nearly simultaneously with the hair or hairs.

Why are pics out of the question exactly?

Don't worry though, you've got time to differentiate between sexes. If you've got 'em, males won't be mature enough to spread any pollen for at LEAST another week, and I've read elsewhere you've got more time than that. (Go with the week to be safe)

One last thing, Rusty's reply seems dead on except that hermies ARE possible at this stage so just keep an eye or two on it :smokin: