Game lengths based on host, disruption, and other factors. These are average times, not actual times (which highly depend on an element of luck, and how the D2 servers at Blizzard Headquarters is acting; the busier the servers, the more likely it is to be random, the less busy, then requests for deletion will get there quicker).

The longer the game was played, the longer the time (hour is +1 minute, the game will linger for a maximum of five minutes if the game was less than one hour).
The more people, the longer the time (the more players with different accounts is +1 minute).
Amount of activity during game, the more levels/exploration/quests/items distributed, the longer the time (quest is +1 minute, exploration based on percentages of levels I.E., Catacombs depths were entirely explored, +1 minute, level is +5 seconds, uniques and sets add + 5 seconds).
The more often people have left and joined, the less the time (-30 per leave, +30 seconds per join after one hour).
If the host was the only player for less than one hour, the game will die in two minutes. If more than an hour, add +1 minute per hour.
If the host's ISP/internet connection was disrupted, but they were the only person in the game, the game dies on leaving.
If the host's ISP/internet connection was disrupted, but no one else was affected, the game will die instantly when the other people leave. However, if the host rejoins, consider the game like a normal game slashed in half (or four times).
If the host's ISP/internet connection was disrupted, and it caused other players to drop first, the game will automatically die when the host leaves; if other players drop first, and it causes the host to drop, the game will linger for an undetermined amount of time (I haven't figured out the math for this one yet).