I was looking at the impact the ME-262 had on aviation in general, not so much during the war, which really was not all that much. But the poll was for which fighter brought the biggest new advantage. For me, the ME-262's jet engine was a huge advantage as far as speed goes. Had it been employed right and used correctly in would have made a larger impact on the war, but it would not have changed the outcome.
Once the Allies knew the Zero's secrets, it's domination was over. Newer and faster piston driven planes appeared and made the Zero obsolete once it's weaknesses were used against it. Even a good pilot in a Wildcat or a P-40 was more than a match for the Zero. Once the newer Allied planes were introduced, Lightning, Hellcat, Corsair, etc, the Zero was outclassed. These newer planes could pick and choose when and where they would fight. The US changed their tactics because they had to and with their new planes, they could change them. The Zero pilots were not able to change tactics, or do anything if their opponent insisted on keeping his speed up!