'06 rear wheel alignment - Negative Camber?

Noticed the rear wheels of my Sienna do not sit verticle while parked - they have a negative camber. I've had it for two years but just noticed it recently. Took it to my local shop, who know me well, and they said it spec'd out ok. Anybody else notice this on their Sienna? Do they 0* out when rotating from centripetal force?