Most of my flights originate in Spokane, WA, where upgrades are hard to come by -- I'm averaging about 50% between Spokane and MSP (both ways). Out of MSP to EWR, Albany, Balitmore and Cleveland I am near 100%. Companion upgrades are running about 50% between Spokane and MSP, and near 100% elsewhere. Once, flying on July 4, they upgraded two companions -- and I didn't even have to ask! Great customer service.
I just finished a lfight to BKK. I was going to be upgraded because of overload, until they realized I was with 3 members of my family. Gate agent tried to get authorization to upgrae us all, but there were too many other elite flyers on the flight. I am a Gold.