I let mine grow to size 2 before I build the worker. My rationale is that I'm generally beelining to BW, and in the time it takes to build a warrior or a scout [in the odd case fishing boat], my city grows that one size anyway, meaning I've got an extra tile and an extra few hammers. Plus, with BW, I now have the ability to whip just under half of that worker's build-time. I figure I shave the most time off that worker build this way, without sacrificing a scouting trip to find my second city-spot.
Usually my opening strategy works for the capital build : warrior or scout -> worker -> settler -> worker. Techs being the beeline to BW, followed by appropriate worker techs.
Getting that second city going and making it a hammer powerhouse makes an early rush all that more appealing, 2 workers for 2 cities is a good pace for growth. And as soon as both cities have barracks and maybe 5 chop/whip-rushed axes, it's off to war running an economy based completely based on the capture of enemy cities. As long as I'm not hemmed in by protective civs, or isolated, I can usually have 1.5-2 opponents eliminated before 1AD.
I like playing the bully...