The second hand information I have received indicates Can-Am committed to its initial 600 Spyders, for delivery this fall, on a first deposit, first delivery basis. That means that if a dealership took, and forwarded, more deposits than their "initial allocation," other units of the first 600 were re-allocated from dealers who had not yet forwarded their deposits. I've heard of one case on this site where a member was the first to make a deposit at his dealership, only to recevie a confirmation of a 900 series serial number, indicating a spring delivery.
So the two the dealer still "has" to order may be a part of the initial first year run, but not the first 600.
There are members more tied into BRP than me on this site. Perhaps BPS725 or Rob's Performance Motorsports could shed some more light on this subject.