Amazon typically runs a couple of months behind on new high end photo items. Adorama and B&H are among the first. Small local shops also seem to be pretty fast. They only order one at a time, and Canon seems to want to support them.
And the fear in this is that Amazon is supposed to be adding sales tax on all orders as of this Sunday. In CA in my area that's 9.75% or about an extra $225. Its been a nice ride in the past, but those days are coming to an end. At this point, it makes sense to buy from your local brick & mortar store and skip the shipping costs.
5D3, 1D4, 16-35 2.8L ll, 50 1.2L, 50 1.4, 24-70 2.8L II, 135 F2.0L, 200 F2.8L ll, 70-200 2.8L II, 70-300L, 100-400L, 24 TSE L II, 85 1.2L II, 100 2.8L, ZEISS 100 2.0, ZE 50 2.0, ZE 35 2.0, ROKONON 35 1.4, SIGMA 35mm f1.4, S110, S100, sony RX-100 and one big-a$$ bag