Two different reviews I read of our 28-6 win over the Buffalo Bills focused on the same thing: our Pats did great, yet they still weren't satisfied. Luckily, there was nothing bloodthristy about the comments, just fine athletes challenging themselves. One had a quote from Tom Brady, evaluating a pass that could have gone wrong (but didn't) as "stupidity by me." Rosevelt Colvin was happy about the win, but pointed out "I feel we can get better."
That's how they've gotten to 5 and 1 as we head into Week 8 of the season.