What I was saying was a 2008 cutoff for data to determine average performance worldwide is too far away. It would probably be more accurate around 2 years.
Following on from what they said - "We thought 2008 would be the right mark. Taking only the previous game into account wouldn?t give a proper reading, nor would it be right to take the 43 odd years of one-day cricket into the equation."
It started in 2012 and 2008 to then represents a four year cycle, which when I think about it four years would be the minimum amount of data/matches that you'd need for something like this. Two years just wouldn't provide enough data, like there is only 1 or 2 ODI series' here a year.