I had to go to your gallery and see how your watermark looks like because I couldn't remember. So, no I don't think that it is distracting. You always put them on places where they don't hide something important and it's also not that big.
I've never noticed you had a watermark, and I've been following you for a very long time. It's not distracting at all and the placement always seems as if you thought it through. I don't see why any group would decline an artwork based on a watermark like that.