YMMV- the more you're in pump relief, the higher your PSID. Once the pump is out of relief, the filter is mostly invisible. Once there's a single flow out of the pump, the filters drops in line (as in "get in line you pipsqueak") in terms of relative resistance/restriction ..which the engine a much bigger player.
Loading can and will alter this generic description. It would tend to increase PSID since you're basically dealing with a smaller filter. Volume limits, which aren't normally apparent to your run of the mill driver, will perhaps come into play to some degree until full warm up occurs. Again, in that scenario you're dealing with a loaded filter that would evidence any volume limits at lower levels.
At cold start, and assuming that there's vacancy in the rest of the engine, you'll see some PSID until the engine is fully enveloped, providing "back pressure" ....shoring up the back side of the media. That doesn't mean that it reaches the bypass threshold.
Engines with high volumes, higher pressure limits, higher cold pressures and otherwise exceptional conditions will have varied instances of elevated PSID ..but for your common Joe Q. daily driver ..any events will probably be transient and unremarkable.
In my observations with new and used filters it's not a matter to dwell on.
