The difference in price for the M-5 over the M3 is for having a larger vehicle with 4-doors. The M3 outperforms the M5 and is the pinnacle of BMW's M division. They've won dozens all of those racing championships with the M3. Not the M5. The M5, as outstanding as it is, was an afterthought for BMW M. They wanted a fast car that older, less aggressive drivers would want. This seems to be the target market for the CTS-V as well. It will be behind the power curve in it's class of large, high-HP 4-door sedans (upcoming 500HP M-5, E55, R6S, etc..), but for the price it's a great choice.
GNSCOTT said:No one said anything about 1/4 mile times alone. Look at the lap performance between the M3 and M5. My comparison is between all 3 cars. You could pay $20k plus for an M5 over an M3 or CTSV just to have a bigger car. If you can find the $20k difference justification between an M3 and M5, i'd say you would have to be a world class racer and even then i'm not sure.
BTW, Cadillac's 13.1 claim isn't claimed by GM. It says it was done by independent tester. Like every car, there are some faster than others, and i'm sure we will see improved times. As for improved lap times, probably not seeing how the car was tested by top drivers, not magazine testers alone.