I think the comparison would be better if made with currently available similar devices. There are Atom processors with comparable power consumption and, I assume, better performance than the N270.

And then there is the OMAP 5 family, which looks very promising. And the 4470 is a more current representative of the OMAP 4 family. The 4430 they benchmarked is the low-end guy.

I think it's safe to assume someone is building OMAP 4470 or OMAP 5 devices that could be benchmarked against the current crop of netbooks and low power x86 notebooks.