When the PS2 launched I've paid 550€ (22.000 Belgian francs at that time) for the machine. The PS3 I bought for 599€ (including a launchgame of my own choice) so the machine isn't allot more expensive then the PS2 here.It's more expensive than that! But at the same time, no more expensive than PS2 was in 2001. Or at least, my friend said the other day that seeing PS3 for £270 at the moment, that's what he paid for his PS2 in 2001. So for the same money as people were willing to spend back in '01, they get a much more feature rich package.
But what the article does mention is that the pricedrop from 599 (881$) to 400€ (586$) did have it's impact and since then the machine is selling at a faster rate.