Yes it does, your results arent very good at showing the difference due to the variables of the skill of the driver on the day and grip of tires due to standing starts.
Me, h8t w8p and a sean have had a few plays now from rolling, them both being mapped and me standard and they left me for dead. The difference is massive, it really really is, they went past me as if I wasnt trying.
The clips above would suggest otherwise lad. I have also seen how a remap alone car fares with a stage 2+ car, and on the road, there is not a huge difference until higher speeds are reached.