well, these are awful news indeed, for all of you who have been hopin to get their gear on time...
I am saving up for the 17-40 to purchase it along with the 5D3 around this time next year. Hope Canon will lower its pricetag a bit in the meantime. But having read some short test notes on DPR, ISO should be at least one or even two stops better than the 5D3s...Well, that doesn't make things easier, but it rocks quite a bit once the new cam hits the shelves...