I think while the matter has been discussed over and over many times, and yes the devs said the FF is simply the forces coming through the front driving axes from the wheels, it worth a few words.
I think GTR's FF was fantastic...on MS FF wheel. I tried it with my new DFP and it's not so good.
Also my opinion that simply giving the forces to the FF wheel seems to have it's merits, while on the other hand - indeed - we knowingly put aside the chance to give even more feedback on what the car's doing. Yes, this is simulator. But it's also a game.
And (also IMO) the LFS FF is not too great. The ff basically locks the wheel when the car is stopped and you press the brake. It is sawing in the middle. It does not seem to give me correct info on RWD cars (some does not agree some does, this is merely my opinion)
I think the physics need some fixing too, so these may be interconnected. (grip of tyres, gravity, jumping/rolling on curbs, flying when hitting the pit wall parts...)
Until the physics and/or ff effects are fixed I judge by the tyre noise, it's very accurate. The ff usually lags quite a bit anyway (see the 301 threads for proof if you need).
But hey, this is merely a game in development. It's great, great fun, but needs fixing in probably many areas in my opinion.
On a side note: there's no such thing as 'it uses the forces so it's accurate'.
There are way too many thigns simulated - more or less correctly - to say it's the real thing. It'll always be canned to a certain level. It's a programmed virtual simulation of a reality with highly reduced number of variables and components, represented on a 2D screen and a plastic wheel (actually many different wheels with different characteristics).
Please don't tell me it's real. :-) but it's a good game!