ugh...too many haters saying she's not as strong as they make her out to be..or progressed or whatever the hell excuses they want to make.
Sakura is awesome. And she is worthy of Team 7, along with Sai of course. Sure she doesnt have the extra chakra that the kyuubi lents naruto, or the uzumaki blood. Sure she doesn't have the sharingan and Uchiha clan blood. She comes from a not so lengendary line like her two companions. And she doesn't have a special power, like pretty much all the other from that class have (exception in lee as well). She went from a standard 12 yr old kunoichi with no background, to one of the most powerful Medical-nin with extraordinary strength, who even has the possibility of beating her master, one day, one of the legendary sannin, Lady Tsunade.
It is even mentioned that she was able to master so many jutsu that so many have not been able to master.