No team has been better at making bad teams look really bad this season than the San Francisco 49ers. Coming off a 34-0 demolition of the New York Jets on the road, the 49ers returned home Sunday and destroyed the Buffalo Bills 45-3.

After the first five weeks of the NFL season and with three road games already under its belt -- San Francisco is 4-1 and tied for first in the NFC West with the Arizona Cardinals. Those two teams will meet in what should be an entertaining "Monday Night Football" battle on ESPN in two weeks. So how much do we read into consecutive beatings of bad teams like the Jets and Bills?

"When I was coaching, I always knew when we had a good team," NBC football analyst Tony Dungy said. "There were teams that we played that we should beat. We didn't let them hang around. We went out there and took care of business. That's exactly what San Francisco did."

The 49ers lead the NFL in rushing yards per game (195.8) but are 27th in passing (205.4). But they make their money on the other side of the ball. They have allowed the second fewest passing yards per game (181.2) and are seventh in rushing yards allowed (81.4).

"This defense plays well together. They have great communication," NBC analyst Rodney Harrison said. "Dashon Goldson, the young free safety, is tremendous. He knows how to play defense."

San Francisco went 13-3 last season, won a playoff game in New Orleans and lost 20-17 to the New York Giants in the NFC title game. Games like Sunday's show the 49ers are ready to take the final step.

- Brian McNally