I think that after Guy Falkes/Bonfire night is too early but to be expected, as for starting now is ridiculous. Are Easter eggs on the shelves yet... I'll give it a couple more days.
I think its got to a point were they are spoiling Christmas for kids. They've not been back at school 5 mins, today I saw to young school kids looking totally bewildered looking at Christmas gifts, asking when it was.
They're not daft, these retailers. They know fine well that if you buy a tub of chocolates today you'll have to buy them again because you'll have eaten them.
Two weeks ago I saw mince pies for sale in M&S. The best before date was in October.