Saddam was willing to withdraw, the best work on the Iraq side of the war, Kevin Woods' _The Mother of All Battles_, makes that fairly clear. That does not mean the air campaign won the war on its own. Saddam was willing to withdraw because he believed the ground campaign would be extremely successful, that Iraqi forces would not inflict enough casualties on us to stop our advance, and because he feared the Iraqi military would not survive the assault.
In the event, Saddam believed he won the conflict, as his regime survived it. Hardly a ringing endorsement for air power.