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I've only noticed them today but no, I don't think the rear lights come on at the same time. The owner's handbook doesn't say anything about Daytime Running Lights although I did only have a quick flick through it, but if they're present on most new cars then it may well be them.
They look like parking lights, they're certainly not 'eyebrows' like that article mentions. Although I assume they're not 'eyebrows' on all models of cars.