Well, trying to guess performance figures off years old tech releases is probably futile. Hell even if we had current (45nm) PICA200 chip specs, Nintendo's variant is likely so highly customized they'd be inaccurate as well. Really, we won't know fillrate or polygon draw until we get a developer leak or Nintendo just gives out specs.
More important imo is confirmation of the Maestro Shader extensions supporting various effects we've seen in the demos; self shadowing, bump maps, normal maps, specular highlights, etc. Everything may be fixed function, but with the API calls being so clearly simple to implement (especially if they're common in 3rd part E3 demos, which likely had a couple months at most to implement), it means we'll see devs using them often too. For a mobile device (which tends to get lower budgets and rarely pushes programming envelopes) this is a particularly smart, and I dare say, Nintendo-like move. :)
