Yes this, I have two pads and both do not work properly if using R2 to accelerate. My original that came with the system can reach 100% sometimes but only if you press real hard in a certain place, most of the time it's between 80 and 90%, my other, bought later on, is worse than that, only just goes past 50%.
Not that I use the pads since I have a wheel, it would be a major issue otherwise.