Firing from the hip shouldn't be a problem for ported barrels. The top is clear and the gun should be away from your body or slightly canted away to prevent jams anyways.
For experienced shooters, the advantages of porting would be minimal. I can see a bigger advantage for inexperienced or frail shooters that may not have a good grip.
One side benefit of ports no one talks about is retention. Bad guy grabs the muzzle end to take the gun. Just hold the slide forward and fire a round. He's going to let go.
From personal experience, and a few who shoot/compete often, I think there are definite advantages. Are the advantages minimal to significant? That's relative. Also depends on context and expectations. I've read where some stated "it affects splits", but is that b/c the individual is waiting for sights/dot to be back on target? What level of confirmation are they expecting?
Before porting, I was shooting a Glock 45 with Radian Ramjet & Afterburner in competitions. Is that a significant advantage? I would say noticeable difference between with the Radian and say a stock Glock 45/17/34, but a significant advantage for USPSA competition? I say not significant. One aspect is IF I was looking for higher level of RDS confirmation on say a partial/no-shoot target further away, I can get that faster than without. Is that a significant advantage? I would say not really.
However, in the context of CCW and say 3-5 yards, probably no "significant advantage".
The grip is another aspect. Something that shooting the 43x48 that I've found less forgiving, but also something that I think just takes a bit of time to get used to and/or learn. That's where I started using/testing magwells, for the grip aspect vice reloads. I have found that with my hand size, my pinky is on the grip of the 43x/48, but I like the wedging effect of the magwell with the grip.