My friend Pasha, who is a new MD/PhD student at UT-Houston, got accepted into several MD and MD/PhD programs with a 6 in verbal. Of course, you also have to consider that 1) English is his second language, and 2) his other scores were B-14 and P-12.
He got applied to the schools in the Texas application system, and I think got into almost all of them except Southwestern (I forget if there were others). Outside of Texas he applied to Harvard and Hopkins but didn't get interviews. His GPA at the U of Houston was a 3.9.