Think I have mentioned this before.
I have some farmers who are patients of ours, I once had a good chat with one and suggested to me to plant mid May, the ground is in better condition, more sun light hours, warmer.
They plant mains at the end of May, I do the same now and more often than not get really good productive results, I no longer panic to get them in.
There is one chap on our site I reckon has lost around 80% because of the very wet weather and he insists on planting on Paddy's Day! Never learns.