Interesting thread guys. My opinion is that an Me 262 force delivered from mid-43, would have begun to have an effect from mid-44 on daylight operationsd, and from late 44 on night operations. 262s with none of the teething problems affecting operational units is a very dangerous proposition, but not a complete war winner. And, it would come at a price. Overcoming the 262 problems means more resources going into the program, means less resources on the conventional piston engined program, means a harder time for the LW whilst they work up their uber fighter.
Then ther is the issue of what the allies would do in reply. If in 41-42 the allies got wind of the German accelarated development of the 262, they are likley to respond in kind. instead of the F1 entering service mid 44, we would likley see it introduced mid 43. The F3 would appear 3-6 months later, but the allies would need to continue development up to the F8 standard. Historically the F8 did not appear until 1950, with development taking about a year, and then on a strictly peacetime basis. It took about a year of development to get the F-8 up and going, but because it was a development of existing types, would not have suffered great operational difficulties on introduction (as was the historical case...it service introduction was painless and seamless). Under wartime accelarated conditions, I think the Meteor F8 would start to see extensive service delivery from about June 1945. The Meteor F-8 was a long range, high performance fighter, able to travel from Japan to northern Korea, and engage the MiG 15 (with difficulty) so I dont see it as being particualalry troubled by the historical models of the 262.
The introduction of the 262, eclipses the piston era aircraft, but it comes at a price, and it merely swings the aircraft performance debate back in favour of the Germans for a period, not permananetly. It is an advantage, but it is not a panacea for German problems.