Not sure why I'm playing along but you are right MJ is more famous for scoring than passing and rebounding but that doesn't mean he wasn't a great all around player. His career averages for rebounds, blocks, and assists are about the same as James while scoring more points, getting more steals, and having less turnovers.
I wasn't going to bring it up but it's also incorrect to argue that James and Jordan where the same age when they won therefore it took them the same amount of time. Since birth, yeah the same amount of time. Since joining the NBA though, Jordan did it a couple years sooner since he went to college and won a championship there too.
Don't get me wrong I think Lebron is a great player but it's a bit premature to say that he is the greatest just yet... provided he doesn't retire and come back twice
EDIT: Lebron actually won his first title at 27 in his 9th season beating MJ who didn't win until 28 in his 7th year