According to the Japanese PlayStation website, DriveClub will be released on February 22nd, 2014 which is the PS4 launch day in Japan.
Evolution Studios also gave an updated on the delayed title on Facebook:
“We want you to know that #DriveClub is still improving day by day. We’re still optimizing the skies, frame rate, reflections, lighting (in car and out), audio and much more – and that we will keep you up to speed with development as much as we can. Thanks again everyone!”