There was something up with that G70 C&D tested and they mention it in the article because it was slower than the 150lb heavier
stinger they previously tested. Here are the comparison numbers with the C43 and the rest of the cars in the class.
We always like to compare 0-60 but the real numbers that are important in the cars performance are 5-60, 30-50 and 50-70. This according to Car and Driver.
How Car and Driver Tests Cars' Acceleration, Braking, Handling, and More!
Why 0-60 Times Don't Matter in the Real World | MotorBiscuit
As you can see below, the G70 is #2 behind the M340i using5-60, 30-50 and 50-70.
Genesis G70
0-60 mph: 4.4 sec
Rolling start, 5–60 mph: 5.0 sec
Top gear, 30–50 mph: 2.5 sec
Top gear, 50–70 mph: 3.2 sec
Audi S5
0-60 mph: 4.2 sec
Rolling start, 5-60 mph: 5.6 sec
Top gear, 30-50 mph: 2.8 sec
Top gear, 50-70 mph: 3.5 sec
Mercedes C43
0-60 mph: 4.1 sec
Rolling start, 5-60 mph: 5.1 sec
Top gear, 30-50 mph: 2.8 sec
Top gear, 50-70 mph: 3.4 sec
BMW M340i
0-60 mph: 3.8 sec
Rolling start, 5–60 mph: 4.7 sec
Top gear, 30–50 mph: 2.4 sec
Top gear, 50–70 mph: 2.9 sec
Infinity Q50 Red Sport
0-60 mph: 4.5 sec
Rolling start, 5-60 mph: 5.0 sec
Top gear, 30-50 mph: 3.2 sec
Top gear, 50-70 mph: 3.3 sec
Cadillac CT4-V
0-60mph: 4.5 sec
Rolling Start 5–60 mph: 5.4 sec
Top gear, 30–50 mph: 2.9 sec
Top gear, 50–70 mph: 3.8 sec
Cadillac CT5-V
0-60 mph: 4.8 sec
Rolling start, 5–60 mph: 5.5 sec
Top gear, 30–50 mph: 2.8 sec
Top gear, 50–70 mph: 3.3 sec