That would be what you would expect yes, but if camber is working properly, that is, as it does in real life, it will not only increase cornering speed, it will also decrease lap times in a significant way along with helping to reduce tire wear and provide more even heating in the carcass (which as far as we know is irrelevant in GT). In real life there is a tradeoff between lateral grip (cornering) and longitudinal grip (acceleration and braking). Starting from zero camber, laptimes should benefit from adding camber in almost all situations in real life, until a balance is reached where either there is no more increase in lateral g's due to excessive camber, or the increase in lateral g's is offset by a loss in longitudinal grip and produces higher lap times.
You can see from the minimum cornering speeds in comparable tests that some cambered tunes indeed produce faster minimum cornering speeds, but lower terminal speeds and either equal or slightly higher lap times. So camber does work to a small degree in terms of lateral acceleration, but it seems to me this increase is either completely or more than completely offset by not being able to get on the throttle soon enough or rotate the car into position to be able to do so, otherwise it would clearly produce lower lap times.
Take
this test for example. The tune was provided as a good working tune for camber. Lap times with and without camber are virtually identical for this purpose. But let's look at the minimum cornering speeds.
With Camber:
View attachment 287631
Without Camber:
View attachment 287632
This is just one test but other tests show similar results. Clearly camber produces higher minimum cornering speeds, but in this case, the identical lap times. To achieve this, one must be on the throttle earlier without camber, which results in a higher average speed on the following straight. This inference is confirmed by the data, as the terminal speeds without camber are higher than without camber.
In GT5/6 it's known, at least by aliens and a few others that pay attention, minimum cornering speed is far less important than exit speed and how early you can get on the throttle and hold it, the latter IMO being far more important. I know this, I have known it for 4 years, but I don't have the skill to exploit it as well as someone of the skill level of
@Stotty or
@Sutuki or
@super_gt and many, many others. They are far better at taking a car to the limit than I am and pretty much universally, rely on zero camber to get on the throttle as early as possible and perhaps aid in braking and stability in cornering. Note I did not say higher cornering speed.
Now a ham fisted driver like me, unable to drive like they do, I might benefit from camber a little, as others appear to do, not because it is ultimately faster overall, but because my skills are limited in terms of reaching the true potential of the car, but adding camber helps me in a small way to overcome my skill limitation and slightly improve my lap times. But if I was really and truly one with the car like
@Stotty is for example or any other consistent TT top performers, I wouldn't have that skill limitation and camber wouldn't benefit me because the handicap it helps to overcome wouldn't be there.
So in short, to me:
camber working as it does in real life = significantly lower lap times for the best drivers, period.
camber not working as it does in real life = tiny benefits to the lesser skilled drivers like myself because it helps to overcome in a small way, our inability to get a car to rotate and get on the throttle early enough.