IUseBrains, not to argue which kind of shadchanim work better, but each person has a different mediation for meeting their bashert. What works for one might not work for another. A quieter boy/ girl might make a better impression on a (even a not close) friend, than on a shadchan he/ she meets only once. Shadchanim might have access to more people and more of a motivation, but a random neighbor might have the mazal to make the shidduch.
Dr. Pepper, and I thought those kind of things only happened to me!