You kidding youself if you think the times for the Corvette and HSV GTS is actually anywhere near an accurate time for them.
Considering in the US a Corvette Z06 will run very low 12 sec 1/4s, and that Convertible Motor tested was modded to Z06 spec, then you can see how quick it should be.
Ever see the times they get for the Mustang, mid 14s! They run mid 13s in the US, for exactly the same car!
Hell even the 190Kw GT can run high 13s stock.
14.2 from a GTS?? LMAO, with a good driver and very little mechanical sympathy, I would imagine it could sneak into the high 12 sec 1/4s. Its got 400Hp FFS
Magazines cant drive anything that is only 2wd, thier times for the AWD cars are pretty close to accurate, but when it comes to only one end of the car being powered, they suck plain and simple.
When looking a magazine times, you can generally take anything from 0.5sec to 1sec off their times to get an accurate figure.
Also they dont run the cars down an actual 1/4mile track, they slap on an electronic device to the side of the car and measure the time with that.