Canon UK released a press release where it says that both the EOS-1D X and the new EF 24-70mm F2.8L will be delayed to June-July. No reason is given for the delay, except that there is a delay of the start of mass production. Canon USA confirmed the delay.
Updated sales start dates for the EOS-1D X and EF 24-70mm F2.8L II USM lens
London, UK, 12 April 2012 – Canon would like to advise of updated sales start dates for the previously announced EOS-1D X and EF 24-70mm F2.8L II USM lens, due to a delay to the start of mass production. The EOS-1D X will now be available to buy from mid-June 2012, and the EF 24-70mm F2.8L II USM lens from early-July.
We would like to apologise for any inconvenience caused to customers.