A product missing its announced release date, and the labeling of it as vaporware by the press, can be caused by its development taking longer than planned. Most software products are not released on time, according to researchers in 2001 who studied the causes and effects of vaporware; "I hate to say yes, but yes", a Microsoft product manager stated in 1984, adding that "the problem isn't just at Microsoft". The phenomenon is so common that Lotus' release of 1-2-3 on time in January 1983, three months after announcing it, amazed many.