This paper says SAT-V > 630 places her in > 99.99% group.
http://carrefoursagesse.wordpress.com/2009/02/18/the-cognitive-profile-of-the-precocious-student/And:
"Finally, an interesting trend was revealed. The presence of exceptionally high verbal ability appeared to increase the likelihood of the presence of high mathematical ability."
She may not have had the exposure to mathematically intermediate topics that would allow her to perform at a much higher level. Most math knowledge is not readily available like good books are. Most people get their math via school and not via self-study and ability at math is suppressed in girls due to social pressures. I imagine most kids who > 700 on the SAT-M have had the full two years of Algebra, another of geometry, another of analytical geometry/pre-calc - or at least a good exposure to all the above.
In addition, if she is not in a Latin program or has not had exposure to classic English lit, then that would retard her scores on the SAT-V.
All in all, very impressive.
