The Optitron backlit instrument panel changes intensity quite visibly when the headlight switch is in 'Auto' position and it turns on the headlights, similar to when headlights are switched on manually.
Not on our 2006 Sienna, same intensity unless you use the dimmer switch to manually adjust. The only interor side is a little green indicator that comes on to signal that the headlights are on, and it's almost unnoticeable. The first month or so with our van, my wife and I would catch ourselves in twilight without having turned on the headlights, usually within a few blocks. We've gotten used to it now. Many people, judging from the vehicles on the road, haven't though.
WIth DRL's, there are so many "standards" that are acceptable, it's laughable, as they might as well not have them. I'm sure there are more, but there seem to be the following systems: high beam bulb/filament on reduced power (most common), bright front markers only (second most common), full headlight & all markers (seemed to be used only on some of the very first DRL cars in Canada), fog/driving light only, low beam bulb/filament on full power only (without markers), the Chrysler "winking" system with any of those options which turns off the DRL on the side with the turn signal on. Seems quite stupid to me. And once an owner takes delivery of a car, they are free to disable it, as the law only requires that the veichle be equipped from the factory that way.
As for the amber rear turn signals. About time! I would also like to see turn signals visible from the side of a vehicle (Euro style - either on the fender or side mirrors).
That said, I'm counting on NHTSA doing absolutely nothing once everything is said and done.