Getting an answer is only the first step. Afterwards you are invited with around 20-30 other persons to visit the flat. It's like cattle looking for a new shed.
When I was looking for a flat together with my girlfriend 3 years ago, we got several viewings of our own together with the agent.
This seems to depend completely on whether the commission is paid by the owner or the tenant - the only time we had a "crowded" viewing (but still only about 5 other people) was for a flat where the commission was paid by the owner.
Another factor might have been that we were looking in the outskirts of Munich - if you think you absolutely need to live in Schwabing or Glockenbachviertel, it's your own damn fault.