People havent really got used to their cars yet, havent trully dialed them in. Some mags tested the car and ran 15s others ran as fast as a 14.3, so it depends on a couple of factors... driver, launch, track conditions, elevation, etc. etc.
lol, but im sure you should be seeing trap speeds similiar to the redline, but i dont see how motortrend got a 99 trap, that cobalt must of been on crack. because they tested a redline at 97mph which seems more fitting.