Clean install anecdata point: my shiny new EE (which after 3 hours I already love more than life itself) shipped with Dingo 1.6. After set-up, I immediately did the Ermine update, and the only problem I've noticed thus far is the hibernation thing. Usual drill: it woke up the first time I opened it but needed the battery popped the second time.

Seems like a tiny inconvenience, especially since I'll mainly power down when it's out of use.