In the context of motorsport and track driving, the short answer is almost certainly not! Wings add considerably more downforce than drag, and downforce generates extra grip. Providing that grip is well balanced front and rear throughout the speed range, most drivers will have no problem exploiting the extra grip and lapping or running faster over a given course. The extra grip helps not only to maintain higher cornering speeds, but it also helps with braking, acceleration and confidence too. Indeed it is often the case that end of straight speeds increase once a car generates more downforce by using wings, despite the generally small amount of extra drag they do also create, because speed through the previous corner will be higher, and acceleration out of it will possibly be better too.
When it comes to improving lap or run time, maximum speed is not usually very significant, whereas grip is crucial. There are exceptions where high speed is maintained for a sufficient length of time to be significant of course. But this is why we like to advise you personally on the best wing configuration for your car, so we can take into account how much power you have, what venues you compete or drive at, and also advise you on ways to aerodynamically balance your car so you can maximise the benefit of your new wing!
Use this formula to convert drag into absorbed bhp: (2 x drag(N) x speed ( m/s )) / 1500
If you look at the front wing in ground effect data you will see that there is a sharp rise in downforce from ground effect when the wing gets below 100mm to the ground. To keep the car stable & predictable over bumps or under heavy braking, it is advisable to mount the wing 100mm or higher so its operating in a more linear & predictable region.