The numbers achieved and stated by the magazines are usually accomplished by professional drivers and mking the car launch (by popping the clutch.) THe problem lies when a regular driver tries to see how fast his/her car can go, they will generally not be able to do this and the times are much slower. The CF has such big wheels and tires, that it would be extremely ery difficult or maybe almost impossible to "launch." Which means that the 0-62 in 6.5 sec is easily achievable by almost any driver. This means that you can spank the auto RX8, and probable the manual RX8 also.
Iceberg