We know what we're talking about when we say "America lost the war in Iraq" - they waltzed in with a surprisingly low level of understanding for the former regime and the people, and completely f--ked up.
Now, say America had more troops that were to go into Iraq - say, heeding Shinseki's advice, 400,000~500,000 people. But no reforms in the bureaucracy, maybe buying less jet fighters, etc. Say America went in with such numbers instead of the 192,000 that we saw IOTL.
Could have America accomplish what it came in for? Could peace and stability been secure with this scenario? Or is "troops'd have made us win" a myth in this case?