@KZ2: No, they are becoming more and more representative and objective. Some of Crazzy' controversial assumtions made for this comparision will mather less as times goes on and comparision timeframe is longer. This does not mean that it will be proven that PS3 is selling as good as PS2 but comparision in itself will be better.
@Sqrl: The next 10 PS2 weeks in Crazzy' comparision will be from July 8th to Sep 9th with around 2.5 mln sales. You are probably refering to Holiday sales but Crazzy won't take them into account for a while. Your point that PS2 and PS3 difference will grow in following weeks is probably true but it won't happen as fast as you said.