how much time is a pawn worth In bullet, blitz, and rapid chess having more time than your opponent is an advantage. I'm wondering if there have been any efforts to determine how much of a time advantage a pawn is worth. Or say a knight. Has anyone tried playing machine matches to figure this out? Since I frequently play speed chess this could be good to know. For Example: 1 pawn = 1 minute advantage in 5 min chess; 1 knight = 30 second advantage in bullet; etc.
This is a well known quote about pawns and tempi:


  A pawn is worth three tempi


So a pawn is worth 3 good, developing moves. Given that most games are 40 moves long then for bullet and blitz we have:


Bullet: 1 minute for all moves per side implies 1/40 minute per move, implying a pawn is worth 3/40' = 0.075' = 4.5''
Blitz: 5 minutes for all moves per side implies 5/40 minute per move, implying a pawn is worth 3*5/40' = 0.375' = 22.5''


This is a rough guide and the value of a pawn varies by position.