[Martin Smith]

No. No. No and no again, my friends. This morning, nice and fresh, I did 20 laps, really, really focusing on what was happening from lap to lap.
Apart from a couple of inevitable crashes, ALL the laps were between 14:5 and 15.2. This - it seems to me - confirms that I am  certainly not the fastest guy around, but I know what I am doing and I can be quite consistent.
Now, a couple of important remarks:
1) At this speed, the car feels like on soap. It feels always at the limit of flying away. That is, I am not consistent by being conservative, I am consistent at what I perceive as the limit of the car. 
And, more importantly:
2) Like always, inevitable variations of line from lap to lap lead to inevitable swings in the delta bar. BUT what I would gain or lose would be one, two, maybe three tenths. Over a lap, things average out, so I am consistent between 14.5 and 15.2. NO WAY ON EARTH I could get a second here, a second there. This is inconceivable. 
Come on the throttle earlier? Been there, done that (maybe even only by chance): result, a couple of tenths gained. Trail braking when possible? Same story, a tenth, may be two or three. I observed carefully and I have seen it happening, lap after lap, and I remain with the the bottom line question.
WHERE THE HELL DOES ONE GET SIX SECONDS?

If you can't come to terms with the math adding up to six seconds, look at it this way...

Your laptimes equate to an average speed of 194.22 km/h for the fast guy and 186.372 km/h for you given a track length of 7 km. So over the lap he's averaging about 8km/h more than you.

Now look at your respective speeds in the comparison vid.

At the braking point for La Source he's 215 and you're 213 - 2 km/h
At the apex he's doing 72 and you're doing 68 - 4 km/h
At the top of the hill he's at 231 and you're at 224 - 7 km/h
Top speed as you said is 241 versus 235 - 6 km/h
Through Les Combes he's doing 147 at the first apex, you're doing 131 - 16 km/h
At the apex of the left hander he's at 145 and you're at 140 - 5 km/h
At the last apex he's doing 165 and you're doing 151 - 14 km/h

If you carry this through the whole track an average difference of 8 km/h is very conceivable. Remember also, my experience is that the replay under-reports the speed of opponents so the speed differences at each point are likely greater by a few km/h.