Also, looking back at the period when the single was announced, it doesn't seem like any sites picked up on that information.. mainly the sites that were obsessed with JE information. Perhaps it was never actually confirmed at that time?
Generally, if a new single is announced somewhere [whether it be in a magazine, at some CD shop, or online] it appears at fan-net's "
New Song" page. ARASHI's single is nowhere to be found in the February or "To be released" section. (And Livedoor never seemed to pick up on the information either..)