I think I have found a little difference between Int and Domestic. But overall NW agents have been very accomodating to me at SILVER, GOLD, and Platinum levels. Certainly better treatment then Delta gave me with a 1st class Award ticket.
As for being comped Gold, I wonder what people expect. I have 900,000 miles with NW and I have to settle accept flying 25,000 miles to get Silver. I appreciate Nw limiting non Nw flyers from filling the 1st class seats and giving me a chance at them.