What is the standard time for a chess game?

On this website a standard game is 30 minutes in length, but I know that when GM's play each other they play games that last much longer.  I don't know the exact length, but I know they're longer than 30 minutes, because I know that certain games GM's have taken up to 40 minutes to make one single move.  Also what is a typical blitz game length?  On this website a 5 min game and a 10 min game are both considered blitz games, and you have the same rating for both.  However, I remember watching a game where Kasparov played Nigel Short in a 25 minute game and it was considered to be "speed chess".  I want some answers please.  

Standard just means the time control is considered to be the same category as a 2hour game.

Um...so are you saying that any game that lasts between 30 min and 2 hours is a standard game, and that your rating for these games is the same?

FIDE currently has one official time control for major events: 90 minutes for the first 40 moves followed by 30 minutes for the rest of the game with an addition of 30 seconds per move starting from move one.