litsen, i'm not saying Messi sucks. he's amazing. but he's overrated. people are really excited about his talent and seeing almost a Maradona re-incarnation, and it's pushing his hype way ahead of his real accomplishments. not to take anything away from the guy, like you said, he's only 21.
That was true for all the "Argentinian prodogies" since Maradona, Riquelme, Aimar, Ortega etc. etc. They were all the next Maradona but Messi is a little different. He's gotten european fundemantal and South American flair.
I expect he actually might be better than the mighty D10s himself when all is said and done.