I don't think there is any need to defend their choice; a bunch of people here disagree, but that doesn't make them more "right" or "wrong" than IGN...
Personally if I was given a choice of a PS3 or 360 to play over the next 3-5 years, OR a PS1, the PS1 would be my last choice. Not that it didn't have great games, but I expect much more from my system now (on-line play, HD graphics, wireless controllers, downloadable content).