Posting 16-01 had approx 350 wide body Capts system wide..... 450 sounds huge but reasonable. That's pretty big but not that far off from '16. Throw in retirements, added triples, keeping MD's and Buses..... we shall see.....
My buds in the triple school house confirm some posts above, plus trying to ramp up to 16 crews per month.
So the Aramark lady is a good source....