Looks like Capcom couldn't just make up their mind. Chris Kramer, Capcom's Senior Director of Communications and Community, confirmed that the demo for Devil May Cry 4 will be arriving on January 24, 2008.
"Warm those broadband connections. The Devil May Cry® 4 playable demo hits both the PLAYSTATION®Store and Xbox LIVE® Marketplace this Thursday, January 24, 2008. Devil May Cry 4 has been rated M for Mature by the Entertainment Software Ratings Board (ESRB)."Look out for the demo, in which you play as Nero, this Thursday.