SCEE's confirmed tonight that the demo for Heavy Rain will be on the PS Store from February 11.
"Heavy Rain demo should be on the store on the 11th of Feb," said Mike Kebby on the EU PS Blog.
A couple of weeks back, an Sony spokesperson told VG247 that a demo was being planned before the game's release near the end of February.
The first mention of a demo came last August during gamescom, when Quantic Dream boss David Cage told us that a teaser was being looked at.
Heavy Rain releases on February 23 in the US, and February 26 in the UK.