The 5-2 victory at the Madejski Stadium lifted a bit of the pressure from manager Arsene Wenger's shoulders following their shock Capital One Cup defeat by Bradford but there remains plenty of speculation about his future.
The Gunners head to Wigan tomorrow only two points outside the top four but closer to the relegation zone than they are to leaders Manchester United.
But Latics boss Martinez said: "I don't understand it from the outside.
"You look at this Arsenal side, they've had to cope with many players moving away and new players coming in. They need a little bit of time but I went to see them on Monday and they were very impressive.
"I thought the movement and the quality of play they had in possession was as good as I've seen from an Arsenal side. Players like Lukas Podolski and Santi Cazorla, they're starting to feel themselves in this league.
"This Arsenal side will never change the way they want to win football games, the football philosophy that they've got, and that's admirable.
"You're going to see this Arsenal side going from strength to strength. They're still in the Champions League, which is the best competition in the world, and I think this team has got a lot to offer."