The answer, apparently, is YES - very much so!
I got some wonderful news (and a kind of early Christmas present) about how my TOEFL Speaking Mentor service has helped a Brazilian surgeon attain a fellowship in Canada, where he will get the instruction needed to become a specialized lung transplant surgeon - the only one in the entire northeast region of Brazil. Patients in that region who are unable to travel due to their illness will in future have hope of the treatment they need.
It's a lovely "feel good" moment for an English Language Teacher with specialisation in exam preparation, and you read about it in more detail over on my TOEFL Speaking and Writing blog.
:-)