The Gunners are now second on the table behind Manchester United after their 3-0 whitewash of the Latics.
Martinez said: "Arsenal are getting stronger. You look at the amount of players they are rotating and they have probably got two players per position.
"They control the tempo of the game extremely well and they develop a real football arrogance that is a joy to watch.
"More than anything it’s the maturity, having Van Persie and Cesc. They know what it means to play for Arsenal.
"They are really talented players, but the biggest compliment you can pay to Arsenal is that they have probably got the strongest squad in the Premier League."