The Gunners left Craven Cottage with a 5-1 triumph.
Iwobi said, "The team spirit is better. The confidence is definitely better. We analyse the games a bit more and we're proving to the fans as well as ourselves that we're able to compete for the title.
"The manager has given me a lot of confidence, telling me that when I get the ball to just be positive. Whenever I am called upon to play, I always try to give my best and make sure that I can impose myself on the game.
"We're not afraid to play anyone. We're playing without fear, we want to be consistent and keep it going.
"But there's a long way to go. It's a marathon, so we just have to carry on being consistent."