Photograph of people waiting for the 6 train by Union Square by Unlisted Sightings on Flickr For everyone who waited too long for a subway in April--NYC Transit revealed that train delays were up 44% in April, which is the latest month with available data. The Post lists the top reasons: 1. Track work (delaying 4,117 trains; in April 2007, there were about half the number of delays due to track work) 2. Riders......