The acceleration of certain visa categories is a subject of the political debate. We have a pilot project at Frankfurt airport, for example, where we have a partly automated border control and an iris scan is used for frequent travellers. These persons can be processed quickly through the immigration controls. But this is a pilot project. Usually there are no preferences. There might be lines in the air traffic for business and first-class passengers. This is the practice in some airports, but legally speaking, all passengers can use all counters equally, so there is no distinction made.
On April 3rd, 2012. See this statement in context.