You didn't read my post did you? You saw the phrase "have not been dominating opponents" and stopped reading right there.
First, I said, "have not been dominating opponents for an entire game.", with the bolded part being the whole point of my post. Second, the Browns won ONE game this year. Most teams dominated them. Most top 20 college teams would have dominated them.
In the Cincinatti game, the Cowboys dominated for 3 quarters, not the entire game. Dalton was 29-41, and threw for 269 yards and 2 touchdowns, no interceptions with a quarterback rating over 100 . You do not dominate a team and have their quarterback achieve those stats. You can beat a team whose quarterback has those stats, but you didn't dominate them.
As I said, the Cowboys have not been dominating teams for an entire game. They have had one or two great quarters against most teams, with a lot of those coming in the fourth quarter, which has greatly helped.
That is not a shot at the Cowboys or Prescott or the defense or any other area where some fan's feelings might get hurt assuming I have some sort of agenda, because I don't. I like this team. I have liked Dak Prescott longer than most other fans on this site and I have been optimistic when it comes to the defense this year. That said, thinking this team does not have weaknesses that will be targeted and possibly exploited in the playoffs by better teams than the Bengals, Browns, etc. is foolish and naive.
Again, as I said, in the playoffs, you typically need 3 or more great quarters of play to win games. Can you win with only one great quarter? Absolutely, assuming you win the turnover battle by multiple turnovers, especially returns for touchdowns, and/or if you score points on special teams beyond field goals. However, relying on one or both of those things to happen usually leads to a loss to an opponent playing conservative, yet mistake-free football. The most reliable way to win games in the playoffs is by winning 3 or more quarters.