It creates lag but not to the ghost, to the players, surely one of the 3 will see the ghost first, thankfully there's ways to know who will get to see ghost first and also ways to prevent lag it thus giving you 90% cance you'll see it first but im not telling. That's the beuty of experience, i'm a day 1 fast drag racer and i've seen it all within the game, if you have a myth i can assure true or false. Time myths are lies even with pictures, even if the picture shows a significant time difference that could've been stage so i test it my self to conclude the cheaters actions and call his bluff, all drag times can be manipulated just to beat the top guy, i can make a BE do 8.8 or even 8.7 with the same 1.8 normal gs thus why i lose respect to most of those on the top times.
I hope this information was useful for you guys. Try your best to tune the vehicle to its self performance, no aids, no cheats, so when you race online you don't get behind.