It depends how big a customer you are. If you are in a position to get 15-20 new 1DX bodies, then you'll be first in line...no question. If you are a smaller operator then friendship and a completely professional, respectful relationship with your CPS may well cut through if that is important to you.
There is usually a fairly long lead time between new product announcements and actual shipping dates, so if you get your name on a wait list at a big, high volume authorised Canon reseller as soon as the new product is announced, you'll be pretty close to the front of the queue when the 1DX-II (or whatever) eventually ships.
There is a great deal of truth in the old saying, "the early bird always catches the worm..."
FWIW I have had no gripes with CPS in over 15 years. I think they are awesome, and are the prime reason I switched from Nikon 15-16 years ago. Nikon NPS may have lifted their game in the meantime, but CPS won my business as a long-term Canon customer.