Times of different live chess games.
Bullet rating - For games under 3 minutes.
Blitz rating - For games of 3 minutes to 14 minutes.
Standard rating - For games 15 minutes and longer.
It took me a long time to find this on http://support.chess.com/Knowledgebase/Article/View/94/0/why-are-there-three-different-ratings-in-live-chess so I posted it here for quick reference. Note that the per-move bonus time IS significant here - not just the base minutes. The system assumes an average game-length of 40 moves to estimate the total length of time available to each player; the result is what determines which rating is affected by a given time control: A time control of 2 | 12 therefore results in a Blitz (not Bullet) game like so:
2 minutes + (12 seconds x 40 moves = 480 seconds) = 10 minutes
(Exactly the same logic determines where a game appears on the time-line of the Seek graph.) As a reference, here are the basic pre-sets available in Live:
|Time Control||Estimated Length||Game/rating type|
|5 | 0||5 minutes||Blitz|
|10 | 0||10 minutes||Blitz|
|2 | 12||10 minutes||Blitz|
|3 | 0||3 minutes||Blitz|
|4 | 4||6.5 minutes||Blitz|
|15 | 10||22 minutes||Standard|
|1 | 5||4.5 minutes||Blitz|
|1 | 0||1 minute||Bullet|