Interesting topic this one Tom.I'm a great lover of aperture priority and shoot most of my photos in this mode.However,i own a panasonic bridge camera that I purchased mainly for wildlife shots......it has a 600mm lens and constant 2.8 aperture......and have started to experiment with the intelligent auto setting.This is a very advanced form of auto and effectively turns the camera into a point and shoot machine.I never used to give these type of settings a second look as I used to regard them as "beginners" type settings,prefering to use manual or semi manual functions,but now I have changed my opinion.
After taking many photos of the same subject with both manual and IA settings i've come to the conclusion that image quality is very close between the two and in some cases better in the IA setting,depending on the subject.
Full manual control is ultimately the setting that will produce the goods,but it all depends on the skill and knowledge of the photographer using it.The IA setting uses advanced programming that has been put into the camera by extremely knowledgable technicians and does it's best to create as near to a perfect photo as it can in any given situation.....and in some cases it will do the better job,especially in situations when the light is good and it can select lower iso's and fast shutter speeds.
I'm not saying that this type of setting is better,far from it,manual or semi manual settings are the ultimate if you can get the most from them,but what I will say is that advanced auto settings have their place and and will often get you a shot that you would not get with manual settings.
I'll try and post some examples later on to show you what i'm waffling on about.
Happy days,
Neil.