Halo 2 Increases Xbox Live Usage 500%

Usage of Xbox live increased 5X since the release of Halo 2, from one million in the week preceeding release to 5-6.5 million, a trend which is reportedly still going strong. This data comes courtesy of a study by Sandvine, courtesy of David Fries' MSDN blog, where he says:

Not like this is something we didn't know was going to happen, but interesting nonetheless...

I think an increase was expected, but these levels are unprecedented. Xbox Live is credited by many as being a significant contributer to Xbox's meteoric rise in market share.