How quickly should oil pressure come up?

I'll think about that next time I spin mine over to fill the carb after all the gas has evaporated out from setting for a few weeks. In a perfect world we would all have fuel injection or at least a priming pump to help the engine start faster. I can't help but think that 300 or 400 cranking rpm wouldn't pick some oil up and send it through the crank.
Mike, do you have a vent you can open to fill your float bowl? On my Carter AVS, I open the vent, put in a little funnel, and pour in 2-3 ounces of gas. It starts instantly after sitting a week or more. Otherwise, it's crank for ten second or more until the pump fills the float bowls.