You guys are doing a great job. I have to say that this is the one podcast I listen to every week. It's short, it's informative, and it's intersting. kudos.
One thing: not to sound like a fanboy here, but the Gamecube launch wasn't too shabby - Smash Brothers & SW: Rogue Squadron II were pretty awesome games; games that even today are still the best in the cube's lineup (wait a minute... that doesn't sound too good). Super Monkey Ball was a sleeper hit, and SSX Tricky wasn't too bad (although it was a crappy port of the PS2 game).
I was just wondering why your analysis stopped w/ xbox and ps2. The gamecube could almost help prove your point that the quality of the launch titles really doesn't mean much for the console's lifespan.
Come to think of it, the same could be said through comparision of the DS and PSP. Bad launch lineup, leader in sales (as of now), and vice versa. Interesting indeed.