No it isn't a fact. If some of the other top 10 drivers had the same advantage this bug is giving you then they would actually be much faster than you. If you want evidence of that change your password to a throw away password and arrange with one of the top drivers to test on your account, run your fastest time and I bet he beats you by a lot on your own account.
But I do feel you are not getting a fair shake here and this bug may not be getting investigated thoroughly enough. After my own testing I'm giving up on this game for now because it is completely broken. I have about 10 accounts on my Playstation including 3 PS+ accounts. Last night I tested on 2 different PS+ accounts and even though they felt a little different I was running approximately the same times so at that point was confident I didn't have a bug. After reading this thread this morning I was curious to try some things so I tested again. This time with an account that has never played the game before. And immediately I thought both the other accounts had the bug to varying amounts but not as much as this thread makes out because on the new account I was trying I had to brake much much earlier but I was not 3 seconds slower, my times were still not much slower than the other accounts because even though I had to brake much earlier it seemed I had other advantages the other accounts did not. I was puzzled and started to think maybe this bug does work to varying levels. So I tried another account. This one turned out to be my fastest account after the first try. With this one I could brake later than any other account but it had other disadvantages. So far every account was different. I kept on switching between these 4 accounts and noticed my force feedback felt different between the accounts. When I went back to the slow account for the second time the strangest thing happened, now I could brake later on it the second time. Now my times were a bit faster on it. Then I noticed something else odd, my wheel on screen no longer matched my steering input, the wheel on screen turned more.
My conclusion from my testing is I don't have the bug but my game is completely broken and is different every time I play it. I don't know how long it has been like this because normally I log in once and play it until I log out. I think it has been a long time because something similar happened when my son and I had a fast lap competition and tried each other's rig. At the time I just thought what was happening was odd but I've just remebered that because of my testing results.
I know this information doesn't help with the investigation of this bug at all because the bug in question that you and some others have had is persistent where my game is just broken and all over the place. I'm starting to wonder if there is something going on with my Playstation Pro? But at the same time someone else mentioned in this thread they also experienced different physics with different log ins and people have wondered if this bug could effect people to varying amounts. All I know is I have lost all faith in the integrity of this game. Something else I still find odd about this game is how comparatively slow I am in it compared to other games. I've just renewed my account on iRacing and I'm not up to speed there yet but already I'm much closer to the fastest times then I am here and in the Cadillac this week not only is my time in the top 15 it is only 6 tenths of the fastest time. On GT Sport since the last update I'm even slower comparatively to the top 10 then I was previously for no reason except there was an update and now I'm even slower.
What does this mean to you? Clearly there is a bug, clearly you have been positively effected by it. Maybe you can help with testing and provide information that might help identify the cause and help fix it. Maybe the root cause to the bug is also what is causing some of us to have an inconsistent experience. Either way there are people who have stopped playing this game because of this bug and I'm not going to play this game because there is no integrity IMO. Maybe you can help fix that.