You guys should read Digital Foundry's analysis on Driveclub. What the game is able to do technically is amazing. To think that a technical analysis article does a much better job at reviewing the game than an actual review is mind boggling. Heck, the guys that did the analysis straight out said that they enjoyed DC more than the person who did the review.
Source: http://www.eurogamer.net/articles/digitalfoundry-2014-vs-driveclub
EDIT: GameChaserBE already pointed this out, but Sony is delaying PS+ Driveclub to ease server traffic. Could it be because more people wanted to get the PS+ version than Evolution anticipated?