I was playing League of Legends and encountered my first instance of a teammate disconnecting and leaving the game (rather than a temporary disconnect). After I got over the momentary dread of being roffle-stomped, I played as normal and noticed that myself and my teammates (including one that I party with regularly) were doing surprisingly better than usual.
I've played custom maps in other similarly-styled games (StarCraft 2 custom maps that play like LoL/DotA, for example) where the rest of the group was made a bit stronger when someone left to compensate for the imbalance. Is that at work in League of Legends as well, or were we doing well without any additional help from the game?