I have started shooting gun slightly down. Like a soft mount I suppose.
I haven't heard many other people mention this - but I find with gun up I have X amount of seconds before I become increasingly aware of the barrel more so than the clay, which is not good - especially for a below average shot like myself.
With gun down I feel like I don't afford myself the luxury of noticing the massive gun in front of me for too long. Might just be me.