The sensor in the Samsung is a Lot smarter than the Lumias. Nokia "skipped" those sensors to concetrate on the PureView technology.
The images posted here are not just point and shoot. Even if some of them are taken in Auto mode, there is some knowledge behind the shots in terms of lighting and composition.
So, yes. You can take great photos on a Lumia, but it is much easier on other phones.
Personally I mostly use the tap on screen to capture since it seems to make it easier for the phone to get Whitebalance right. I also use the shooting modes like landscape, macro etc. The only manual setting I use is normally Whitebalance to help out the camera in tricky situations.
Sent from my Lumia 800 using Board Express