I think you could make the argument, but frankly there is a big difference between the three. Gamecube had some great games, but frankly the library just doesn't stack up to the PS2. I owned and loved a GC for many years, but the 3rd party support just wasn't there. Now the first party titles are killer and still some of the greatest games ever made.InvisibleMan said:Couldn't you say the same thing about any of the consoles of the PS2 generation, though? GameCube and the original Xbox games are just as cheap, but usually the graphics were better in those systems...
Now the Xbox has a pretty decent library, but it fell off really quickly. Sony continues to support the PS2 whereas Microsoft cut all support within a year of the 360 releasing. Was this a bad move by Microsoft? Well, if it was, it didn't matter because I think they're clearly dominating this generation of consoles.
All that to say, all three are great and if these consoles were in their prime it would be a tough fight still... but... as it stands, I think the PS2 is the current standout from that generation.