Sounds strange to me. That would be equivalent to 18mm on FF, which is not very popular - AFAIK only Zeiss makes a prime with that focal length.
I would expect Canon to first release more popular focal lengths, e.g. normal (~28mm).
18mm is a pretty good focal length; I find 14mm equivalent is hard to find use for as it is TOO wide ... and 28 is pretty boring and well covered by almost every other EF-S lens out there, so I'm glad it's not 28. if this turns out to be a great lens I wouldn't mind going back to APS-C cameras just to use it.