Going fast either takes years or a lot of time and talent.I've been pounding round for many hours and think my lines/braking/gears are OK. I'm fairly consistently in the lower 2:06's and might scrap a 2:05 on a hot lap with softs and a low tank of fuel. I'm in the GT-R and have only really tuned the gears as described in the setup guide. I've seen 2:02 from others drivers but I can't see where I'd find 4 secs. Can you really find 4 secs with a well setup car?
3-4 seconds on a 2 minute track isn't that much!
If you really want to see black on white where you're losing time, install acti (download from RD), record a "good" lap and send me the files.
I'm used to using motec to see where I'm losing time so I could do a quick analysis.
I know how you feel.. You think you're in the limit. But you're just on the limit of the tyres in one direction.
The really fast drivers steer a bit differently, use the pedals better and then use the maximum grip of the tyre more efficiently.
I'm not super fast! More a midfield driver but I've seen in motec how my driving looks compared to someone 2-4 seconds quicker.
Motec is the best to "destroy the magic" and shed light on why you're slower