Well he was certainly pushing his high-tech reforms under the argument that they would allow a smaller and lighter force to be just as effective, if not more so, than the previous organisations. That's apparently a large part of why he went against Shinseki's force recommendations since he figured they were too high and Iraq would be the perfect place to showcase the results. Now to be fair there was probably a fair amount of truth to the idea provided that you were dealing with conventional opponents as shown by the initial invasion, it was the later occupation/counterinsurgency part where the wheels started to come off and you needed more boots on the ground.Actually wouldn't Rumsfeld's death be better for how Iraq is handled as I've heard that a lot of the more bone head decisions (at least as far as military matters go) that led to how the US handled it came from him.
I've no idea where Wolfowitz stood in the debate or whether being new to the position would allow him to ignore advice like Rumsfeld did, but if you can find a way to get a force structure more towards Shinseki's numbers that will be an immediate improvement. I definitely think that the invasion of Iraq will go ahead, just look at what was known as the Wolfowitz Doctrine that he wrote back in the late 90s.