No matter what anyone says...
...about the context of this piece, I believe it is still amazing. Great attention to detail, especially the glow from the fireworks in the background. A slight thought about the setting though. If fireworks are going off, it would be safe to assume that it is night. Wouldn't the snow be receiving a much higher amount of green from the lights then? Or if the moon were to be out, then it would be a bit bluer, blending into the green light. Just my thoughts on that.
There was one other thing that bothered me just a tad. Ross blends in very well. The edges where his body and clothing and the snow meet blends beautifully. That isn't what I was noticing. The left side of Nort (under the desctription that you gave, I'm going to assume that Nort is the person on the left), is kind of hard against the snow. I don't know, but it may be because the lights and darks of the brown jacket don't blend as well to the snow as Ross' white jacket. But mainly, Ross' hand holding the snowball. Hard lines. Though it contrasts itself enough from the snowy background, to pop it out, it flattens itself against the rest of the colors of that hand.
Then again, could just be me. Great piece though.