We did have some talent in 2000, but the fact is that we didn't have anywhere near the talent that many people thought we did. The so-called "Pancake Posse" was nothing more than overweight and overrated linemen. The defensive line was heavily dependant on incoming freshman, all of which either didn't qualify or didn't contribute. There was no leader on the team. Furthermore, we were all fools in not seeing that Shaun and Samuels were the heart and soul of that team, and without them we weren't much. That is nothing like LSU of 2004. Moreover, Saban is no Dubose, and you can't overestimate the impact of that.
But, "Question is can an inexperienced LSU team play at that level for 11 games?" What are you talking about? LSU returns 16 starters, by my count. They return 8 from a defense that was almost inpenetrable last year, and on offense, they return eight as well. Sure, they lost Clayton and Henderson, but Skyler Green will return, and he's probably one of the most explosive receivers in the country. Furthermore, the running game will be looking for a breakout with Justin Vincent as a sophomore, coming off a 1,000 yard season as a true freshman.
Also, as for Russell, mind you that he's not their only option. Marcus Randell also returns, and he can provide the solid play needed if Russell doesn't come around. Once again, with LSU's offensive system, you don't need a great quarterback to put up big numbers. A guy like Mauck, who had only average talent at best, can easily throw for 2,000 yards or more in the LSU offense. With that in mind, even an inexperienced quarterback with talent, or an experienced quarterback without a lot of talent, can put up big numbers.
Don't get me wrong, LSU might not win it all, and they most likely won't. However, if LSU is an "inexperienced" team, then we are essentially fielding a group of high school players.