Go back and re-read my first post - where I was clearly being independent of either console, until someone took issue about the Halo vs Rage comparison. Rachet and clank, Spiderman, and Morales, and even games like GoW all feel like they are either triple buffered in their 60fps mode or use some frame interpolation technique IMO, where the 60fps feels just like a flawless 30fps, rather than a true 60fps, like games of old definitely were, which I mostly played on PC - back in the day.
If an engine is interpolating frames, and doing it cheaply it would be virtually impossible to tell it wasn't an interpolated frame-rate - by frame-counting.
It is well known that 30fps Racers aren't doing what they seem, because the rate of travel(by speed) versus frame-rate feedback is massively undersampled and so assisted steering in those (burnout? type)games fudges things to accommodate the lack of feedback to make a playable game. Interpolating frames in the engine for various situations or genres to fake a feedback response is along the same design style, and as someone already mentioned KZ 4 Shadow fall used this technique in single or multi player IIRC.