I have to agree there is nothing unusual in what you are seeing, Steve. On startup, cold incompletely burned fuel and residual lubricant are exhausted briefly, followed by any settled water vapor condensate in the air intake, turned to steam in the cylinders. The air cleaner and intake components in the engine compartment were warm when you last turned the engine off; subsequent cool-down condensed any warm vapor in the system, and the moisture creates the white "smoke" on next startup. If the white exhaust didn't stop after a bit, then I'd worry about a coolant leak.
-Joel