Iwobi was particularly impressive, with his exquisite flick putting Theo Walcott through to put the Gunners two goals ahead, and he was robbed of the opener by Alexis Sanchez's late touch.
"Well, look, I started him last year because I've seen that there's something in him that is quality of vision, quality of give and go, his movement," Wenger said of Iwobi.
"He can break the lines with a pass and individually as well, so there's a lot in the locker.
"Overall, he's only 20 years old so you could see that he has gained in confidence now.
"He can take people on much more and he has gained power as well. It's interesting what he has done."