I believe he was referring to THE 1. The EOS 1. EOS 1s, plural, meaning all EOS 1s, not all EOS 1 Series cameras. Maybe? Maybe not?
Your statement that there are several 1 models is very wrong. There are several EOS 1 Series models, but not several plain-ol' EOS 1 models.
Yes, there are several 1 models, sorry 2F/2F but I stand by what I wrote...there are the 1, the 1S, the 1N, the 1HS, the 1V and perhaps others....they are all 1 series models; Canon's way of updating the 1 without using the same exact name.....perhaps our difference is symantics... ;-)
Coming back home to my film roots. Canon EOS-3 SLR, Canon EOS 1V SLR, 580ex flash, and 5D DSLR shooter. Prime lens only shooter.