Plenty of people claimed Nate was better than Nick after he stomped Jim Miller. All it takes is a simple forum search. There are plenty of fairweather fans at this site who jump from one bandwagon to the next. If Nick gets dominated tonight and Nate wins against Josh Thompson in impressive fashion, I expect people will be talking about how much more Nate has evolved yet again.
You're only as good as your last fight with most MMA fans. Which is why Nate is back to being the 'other brother' for the time being.