Well, since F1 2010 is already heavily optimized for the PC and is also optimized for DirectX 9 as well all they really had to do was port it over without compromising anything. The PS3 uses, if I remember correctly, OpenGL and Nvidia cG which as any PC game will show you OpenGL doesn't have the same quality as DirectX does. Also, look at what the 360 supports - DirectX 9.
Basically, the moral is since the 360 shares so much in common with a DX9-era PC I'd imagine (I don't know for sure) that the two versions share exactly the same code (All settings on high, with vehicle reflections possibly set to ultra) and the PS3 version which uses OpenGL had to be optimized at a much lower resolution as framerate stutter would most likely have been even more apparent than it is now.
You're bang on. 360 and PC are very similar, can't think why! The lag on the pit straights is annoying, I'm not finding graphics too bad on my screen. They're clearly not that brilliant, only platform I can get it on, so won't complain too much anyway.
After more playing tonight. The AI seem quicker with race-fuel than in qualifying. I did a 1'59.5 at Bahrain in the Lotus (all maximum difficult, no Aids, etc) in Q2, so just got through to Q3. I was consistently doing high 2'00s. All fun, bit annoyed with how the AI were so aggressive during qualifying, there doesn't seem to be a qualifying/race distinction for aggression. Race started, and I got raped off the line, down to 14th, but gained about 2 places under braking in to T1. The AI were phenomenal I have to say. I was hampered (I reckon anyway) by having to use worn softs, one off moment at the penultimate corner and I lost 3 places down to 18th and then got a puncture on the next lap. Race ruined, as I ended up having to give way in blue flags, and just had no hope of recovering from 24th. Ended up rage quiting, not sure why I chose 100% distance, I don't have those kind of concentration skills.
The difference in lap times during the race was stupid. From the HRTs doing 2'05s in qualifying, they were doing 2'00/01 with race fuel on board. I could really feel the difference with race fuel, which I quite like. Clearly a major flaw there though.
I still think it's fun, patience is needed of course and I definitely think a patch could and indeed should make the game a lot better than it is.
The AI racecraft was very good, really is up there with anything I've ever seen in a racing game. Frustrating in many ways though, least not because I see a game with bundles of potential.