If you mean April 2012, then I doubt it, as that is when Max Payne 3 is launching, but maybe April 2013, but I hope it won't be that long.
One thing I have forgotten is Take 2, their investors will want to know a time frame for this launch, so if we are getting Take 2 results soon, that might reveal a release time frame
I just don't see rockstar announcing the gamenow if the release is so far off. The company could easily launch both games withen a close window as there are multiple studios and the games are very different. truethfully the only thing that would hold it back that long other then delays would be trying to release a wii U verssion along with the PS360 version. If it happens that way I will assume the wii U version was the cause.
They have kept quit so long about the game it could easily be close to completion.