Is the engine making good oil pressure otherwise?
All of my vehicles with oil pressure lights take a second or two, some considerably longer, to extinguish and those with real oil pressure gauges (not dampened/dumbed down indicators) usually take a second or two to begin to register pressure. Except for a hot restart after a short shutdown, you will be dealing with some oil having drained back from the upper parts of the engine, even with ADBV's....they are not always perfect. Also a higher mileage engine will tale a bit more tome to fully pressurize the system.
You said '..no more oil light", If the light doesn't always come on before you crank and until the engine starts, it should, also check the circuit. I would change the switch as a precaution, but I am not sure you have a problem that warrants anything drastic.