imo, soon the top 15 will be just as hard to beat as the top 10 for the players outside the top 15-25. and that is just if you add bovia and daniilidou into tthe top 15. these others e.g. petrova, lina k, zvonareva, casanova, safina, kuznetsova, mikaelianl sharapova, douchevina, they will probably be just as hard to beat as well. within 2-3 years i would expect the top 25 to be way above the rest of the field rather than just the top 10.
imo, it remains to be seen that the players that should get in the top 25 soon will compete with the top 10. for awhile i would expect the top 10 to be above these players apart from maybe the players ranked 11 and 12.
Go the aussies! stosur!!!
and good luck russians: dementieva, safina, kirilenko, sharapova, kuznetsova, bovina, zvonareva, dushevina.
also good luck to: azarenka, lucic, sprem, vakulenko, vaidisova, safarova, ivanovic, groenefeld, mirza, krajicek, kvitkova, larcher de brito, lisicki.