My local dealership (BC, Canada) suggests 6k km as the first service. Given it's a stealership, I imagine that is probably ahead of what would be the most optimum service, but it seems reasonable to me. Before the computerized warnings I always shot for 5k km. Overkill? maybe but it just seems like piece of mind to me. Also, 5k turns into 7.5k when my wife is in charge of booking appointments.

I'm guessing the ICE doesn't run as much on a Hybrid as it would in a standard vehicle, which is probably why longer distances are ok.
Different topic, same sort of principle - I'll be attempting to break it in a bit by trying to avoid full throttle for longer than required and by trying to vary my speed/rpm, not sit at one speed on the hwy for a long period of time. Once again, just old-school me, probably not a requirement but piece of mind. Maybe 1k-2k km of this if I can remember that long.