One tiny issue looking at those benchmarks is the fact that they do not include the 8800M GTX. Remember, it's an underclocked desktop 8800GT. Perhaps the closest thing on there is the 8800GT 512MB, but even that is going to be significantly faster than the stock 8800M GTX. The mobile part is only a 500mhz core while the 8800GT has the same number of SP's, just running at 600mhz minimum (but many/most are overclocked from the factory). I think my 8800GTS (G92) was clocked around 650mhz stock but runs at 780+mhz all day long. Either way, comparing the mobile part using desktop numbers is futile.
Crysis is a very demanding game and those benchmarks are DX9 not DX10. A 20% difference can be 25fps and 30fps, which is VERY noticeable. For games where 60+ fps can be achieved in either case, the resolution isn't a big deal. Not a lot of sites bench at 1680x1050 because most will do 1600x1200 which of course ends up closer to 1920x1200 in performance.
If you wanted to see a really good 1600x1200 vs 1920x1200 benchmarks, on the 8800M GTX, and Clevo notebook, Anandtech did a review. Here's a link to page 4
the 1920x1200 benchmarks, page 5 is 1600x1200 because for some reason they couldn't get 1680x1050.
So there you have Crysis
Medium 46.89 to 57.53
High 15.62 to 20.25
When going from 1920x1200 to 1600x1200.
If you look at that benchmark suite, with the 8800M GTX and same notebook as we both have, you'll notice that there is a significant hit moving from 1.92 (1600x1200) to 2.3 million pixels (1920x1200). 1680x1050 is about 1.76 million pixels. As games become more demanding, it makes it that much harder to run at native resolution.