FourZeroTwo of Infinity Ward writes:
"Alright, let me attempt to clarify as much as possible as its clear that there is some misunderstanding on how matchmaking works in Modern Warfare 2 for international users.
The functionality you’re asking for, the ability to connect to BEST connection rather than first available game aka quickest match, is already built into the matchmaking.
There is no need to include an additional toggle where you manually have to ask it to put you in the game best suited for your connection, that should all be done automatically without requiring you, the player, to go through an extra step to request it."
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Modern Warfare 2 Matchmaking Explained