Same here, sold the 16-35 II and first time pre-order. Waiting hopeful that it will arrive soon.$125 off is better paying full price. Wonder what inside "100 Million EF Lens Gift Set"?
It's supposed to be a t-shirt, lens cloth and pin. I'll find out when the lens ships any day now. Buying the 16-35 f/4 IS was funded by selling the 16-35 f/2.8 II, and this is the first lens that I've ever pre-ordered.