If its Close-In-Age it does, albeit not necessarily significantly, because no one marriage can solve it. If we consistently have more close in age weddings, we will continue to alleviate the crisis.
Of Course: Actually the Yated has been extremely helpful in promoting issues that deal with the core issues causing the crisis i.e. Age Gap.
To clarify, shadchanim being hard to reach/not returning phone calls etc. is NOT the cause of the crisis, it is simply a naural result of the core issues.