Well. I kind of understand what you're saying. You're already going 35 and when it downshifts it may just seem like it's going faster becuase of the shorter time it's in first before it changes into second compared to the length of time from a dead stop.
Just a thought.
But again the power should be the same. So im not sure.
Maybe because you don't or cant floor it right off the bat becuase of wheelspin it feels like it is slower than it really is compared to when you're going 35mph with no wheelspin at WOT?
Maybe?
Cant think of anything mech. that could go wrong to cause that.