It depends on the players. Blitz mostly refers to it having the ABILITY to move fast by having -Quickhost on and/or being a small map. The games on my server (like this one) start with quick and 24 hours which means the game will host when all players have turned in their turns OR 24 hours if someone lags.
A game with everyone in the same time zone can do 50 turns in a day, one with people all over the planet tend to do a 1 turn each day.
What I create a new game (it appears on
http://game.dom3minions.com/bin/blitz_chk.cgi as an OPEN game) then someone often starts a thread on it in the MP subforum. Sometimes they request only players from a certain time zone.