UPDATE: DubCNN.com has reported that Kendrick Lamar announced on radio station Power 106 this weekend that his major label debut, Good Kid In A Mad City has a October 2 release date. The Interscope/Aftermath/Top Dawg Entertainment release will follow independent effort Section.80 from 2011, which HipHopDX acknowledged as "Album of 2011."
Lamar has yet to tweet the Good Kid In A Mad City release date, and Interscope has yet to release a formal press release.
http://www.hiphopdx.com/m/index.php?s=news&id=20114