NJ5 on 18 October 2007
A Portuguese website has already mentioned vgchartz twice - once when the Wii became the leader, and now too (5 millionth PS3).
The first time, they referred to vgchartz as "an expert in the analysis of the videogames and console market". They also emphasize that vgchartz tracks retailer sales and doesn't take shipped numbers into account. At the end of that article they also mention NPD, but vgchartz shines throughout.
Links:
http://tek.sapo.pt/4K0/778428.html
http://tek.sapo.pt/4K0/766963.html
My Mario Kart Wii friend code: 2707-1866-0957
